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UHF Wireless Receiver Host EJ-702DR

Suggested Retail Price HK$1,500

Designed for easy installation in an instrument rack or desktop use.
Dual-channel receiver supports simultaneous use of two wireless microphones.
Option to select either handheld wireless microphones or beltpack transmitters (optional accessories).
Reliable wireless reception with automatic frequency scanning, ideal for medium to long-distance performance venues.
Wireless handheld microphones weigh only 237 grams (EJ-701TM) and 140 grams (EJ-501TM), including batteries.

Category

Okayo Wireless audio system

Overview

Overview

Designed for easy installation in an instrument rack or desktop use.
Dual-channel receiver supports simultaneous use of two wireless microphones.
Option to select either handheld wireless microphones or beltpack transmitters (optional accessories).
Reliable wireless reception with automatic frequency scanning, ideal for medium to long-distance performance venues.
Wireless handheld microphones weigh only 237 grams (EJ-701TM) and 140 grams (EJ-501TM), including batteries.

Functions

Services and Support

Support Hotline: +852 2313 0666 Enquiry form

Warranty and Maintenance Online Warranty Registration

Downloads EJ 702DR PLUS

Contact Us

9/F Peninsula Centre, 67 Mody Road, Tsimshtsui East, Kln., Hong Kong

+852 2313 0666

+852 2313 0656

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© 2026 Shun Hing Technology Co., Ltd.

.global-search-overlay { position: fixed; top: 0; left: 0; width: 100vw; height: 100vh; background: rgb(238 238 238 / 0.01); display: flex; justify-content: center; align-items: flex-start; z-index: 9999; opacity: 0; transition: background 0.16s ease, opacity 0.22s ease; } .global-search-overlay-on { opacity: 1 !important; background: rgb(238 238 238 / 0.75); transition: background 0.16s ease, opacity 0.22s ease; } .overlay-content { margin-top: 6rem; background: white; border-radius: 8px; max-width: 900px; width: 90%; text-align: center; margin-bottom: 5rem; } /* Button styles */ #trigger-btn { padding: 12px 24px; background: #42b883; color: white; border: none; border-radius: 4px; cursor: pointer; font-size: 16px; } #trigger-btn:hover { background: #359a6a; } /* Close button */ .close-btn { position: absolute; top: 1rem; right: 1rem; background: none; border: none; color: white; font-size: 1.5rem; cursor: pointer; } import { ref, watch, computed, onMounted, onBeforeUnmount, onUnmounted, nextTick } from 'vue'; import { useFetch, useWindowSize, onKeyStroke, useFocusWithin } from '@vueuse/core'; // const { useFetch } = VueUse; export default { components: { }, props: { 'skipSearchIfNoKeyWord': { type: Boolean, default: true }, 'searchPageUrl': { type: String, default: '' } }, directives: { }, setup({ skipSearchIfNoKeyWord, searchPageUrl }) { const isOverlayVisible = ref(false); const isOverlayVisibleDeferred = ref(false); const globalsearchoverlayDOM = ref(null); const globalsearchboxdomref = ref(null); const globalsearchitemsdomref = ref(null); const globalsearchcatsdomref = ref(null); const globalsearchsuggdomref = ref(null); const uicontrol = ref({ q: '' }); let firstFocusableElement; let lastFocusableElement; const focusWithinModalF = function (e) { //console.log('aaa'); if (!lastFocusableElement || !lastFocusableElement) { return false; } //console.log('bbb'); if (e.key === 'Tab') { if (e.shiftKey) { // Shift + Tab if (document.activeElement === firstFocusableElement) { lastFocusableElement.focus(); e.preventDefault(); } } else { // Tab if (document.activeElement === lastFocusableElement) { firstFocusableElement.focus(); e.preventDefault(); } } } else if (e.key === 'Escape') { e.preventDefault(); closeGlobalSearchOverlayF(); } }; const refreshFocusTrapF = () => { // globalsearchoverlayDOM.value const focusableElements = globalsearchoverlayDOM.value.querySelectorAll( 'a[href]:not([tabindex="-1"]), button, textarea, input, select, [tabindex]:not([tabindex="-1"])' ); firstFocusableElement = focusableElements[0]; lastFocusableElement = focusableElements[focusableElements.length - 1]; }; const focusPreviousDomElementF = () => { const focusableElements = Array.from(globalsearchoverlayDOM.value.querySelectorAll( 'a[href]:not([tabindex="-1"]), button, textarea, input, select, [tabindex]:not([tabindex="-1"])' )); const currentFocusedElement = document.activeElement; const currentIndex = focusableElements.indexOf(currentFocusedElement); if (currentIndex > 0 && currentIndex < focusableElements.length) { focusableElements[currentIndex - 1].focus(); } else if (currentIndex === 0) { // Optionally, focus the first element if at the end focusableElements[focusableElements.length - 1].focus(); } }; const focusNextDomElementF = () => { const focusableElements = Array.from(globalsearchoverlayDOM.value.querySelectorAll( 'a[href]:not([tabindex="-1"]), button, textarea, input, select, [tabindex]:not([tabindex="-1"])' )); const currentFocusedElement = document.activeElement; const currentIndex = focusableElements.indexOf(currentFocusedElement); if (currentIndex !== -1 && currentIndex < focusableElements.length - 1) { focusableElements[currentIndex + 1].focus(); } else if (currentIndex === focusableElements.length - 1) { // Optionally, focus the first element if at the end focusableElements[0].focus(); } }; const searchOverlayTriggerOpenF = async () => { //console.log('searchOverlayTriggerOpenF event received'); window.document.body.classList.toggle('overflow-hidden', true); isOverlayVisible.value = true; await nextTick(); setTimeout(function () { if (globalsearchboxdomref.value) { refreshFocusTrapF(); globalsearchboxdomref.value.focus(); } isOverlayVisibleDeferred.value = true; }, 100); if (globalsearchoverlayDOM.value) { globalsearchoverlayDOM.value.setAttribute('tabindex', '0'); refreshFocusTrapF(); firstFocusableElement.focus(); /// Attach: tab-trapping globalsearchoverlayDOM.value.addEventListener('keydown', focusWithinModalF); } }; const closeGlobalSearchOverlayF = () => { globalsearchoverlayDOM.value?.setAttribute('tabindex', '-1'); /// Detach: tab-trapping globalsearchoverlayDOM.value?.removeEventListener('keydown', focusWithinModalF); window.document.body.classList.toggle('overflow-hidden', false); isOverlayVisible.value = isOverlayVisibleDeferred.value = false; }; onMounted(() => { /// Attach: receive regular JS event from outside of Vue window.addEventListener('search-overlay-trigger-open', searchOverlayTriggerOpenF); }); onBeforeUnmount(() => { /// Detach: receive regular JS event from outside of Vue window.removeEventListener('search-overlay-trigger-open', searchOverlayTriggerOpenF); }); const lastAbortH = ref(null); const scopeTotal = ref(0); const isInitializing = ref(true); const isLoading = ref(false); const facetCountDir = ref(null); const quicksearchitems = ref(null); const suggestions = ref(null); const queryoflastresult = ref(''); const facetCountDir_top4 = computed(() => { return _.chain(facetCountDir.value).first(4).value(); }); const facetCountDir_excepttop4 = computed(() => { return _.chain(facetCountDir.value).rest(4).value(); }); const refreshSearchResultF = async (routeQuery) => { var nv = routeQuery; if (skipSearchIfNoKeyWord && (nv.q === undefined || nv.q.trim() === '')) { //pdts.value = []; scopeTotal.value = 0; //firstRankInView.value = 0; //lastRankInView.value = 0; //currentPageNo.value = 0; //totalPageCount.value = 0; //selectedPageNo.value = 1; //hasSearchCriteria.value = false; isInitializing.value = false; isLoading.value = false; return; } if (lastAbortH.value) { if (lastAbortH.value.canAbort && lastAbortH.value.canAbort.value) { lastAbortH.value.abort(); } } const keywordsSplit = (nv.q || '').replace(/\s+$/, '').split(' '); const lastKeywordsSplit = (keywordsSplit.length > 1) ? keywordsSplit[keywordsSplit.length - 1] : '*'; const reqUrl = ref('/en/api/v1/site/IndexJson')// const reqData = ref({ q: nv.q || '', tids: nv.t ? [].concat(nv.t) : [], si: parseInt(nv.si || 0, 10), c: parseInt(nv.c || 10, 10), src: 'kb', }); const reqUrlCombined = ref(reqUrl.value);// + '?' + new URLSearchParams(reqData.value)) try { isLoading.value = true; const { isFetching, error, data, abort, canAbort } = await useFetch(reqUrlCombined, { method: 'POST', headers: { 'Accept': 'application/json', 'Content-Type': 'application/json' }, body: JSON.stringify(reqData.value) }, { refetch: true, timeout: 60000 }).json(); lastAbortH.value = { abort: abort, canAbort: canAbort }; if (error?.value) { hasConnectivityError.value = true; setTimeout(function () { hasConnectivityError.value = false }, 5000); return; } if (data && data.value && data.value.success && data.value.payload && data.value.payload.items) { //pdts.value = [].concat(data.value.payload.pdts); quicksearchitems.value = _.chain([].concat(data.value.payload.items)).first(5).value(); scopeTotal.value = data.value.payload.scopetotal; //firstRankInView.value = parseInt(reqData.value.si, 10) + 1; //lastRankInView.value = ((parseInt(reqData.value.si, 10) + parseInt(reqData.value.c, 10)) >= scopeTotal.value) ? scopeTotal.value : (parseInt(reqData.value.si, 10) + parseInt(reqData.value.c, 10)); //currentPageNo.value = Math.floor(parseInt(reqData.value.si, 10) / parseInt(reqData.value.c, 10)) + 1 //totalPageCount.value = Math.ceil(scopeTotal.value / parseInt(reqData.value.c, 10)); //selectedPageNo.value = currentPageNo.value; //hasSearchCriteria.value = reqData.value.q?.length > 0 || reqData.value.tids?.length > 0; queryoflastresult.value = nv.q; } if (data && data.value && data.value.success && data.value.payload && data.value.payload.facets && data.value.payload.facets.length > 0) { // 0: {dimension: "cati", u: 'URL, l: 'LABEL', c: 'COUNT', dataumbid: 'DATAUMBID' } facetCountDir.value = _.chain(data.value.payload.facets) .filter(function (itm) { return itm.dim === 'cati' }) .map(function (itm) { return { catid: parseInt(itm.dataumbid, 10), label: itm.l, url: itm.u, scopecount: parseInt(itm.c, 10) }; }) //.first(5) .value(); } else { facetCountDir.value = []; } if (data && data.value && data.value.success && data.value.payload && data.value.payload.su) { suggestions.value = [].concat(_.map(data.value.payload.su, function (x) { return x.text; })); } //console.log('facetCountDir.value=', facetCountDir.value); } finally { isInitializing.value = false; isLoading.value = false; isMoreFacetsVisible.value = false; await nextTick(); refreshFocusTrapF(); } }; const refreshSearchResultFdebounced = _.debounce(function (nv) { return refreshSearchResultF(nv); }, 380); watch(uicontrol, (nv, ov) => { //debouncedRouteChangeF(nv); refreshSearchResultFdebounced(nv); //lastuicontrolvalue = JSON.parse(JSON.stringify(nv)); }, { immediate: true, deep: true }); const isMoreFacetsVisible = ref(false); const expandMoreFacetsF = (e) => { isMoreFacetsVisible.value = !isMoreFacetsVisible.value; focusPreviousDomElementF(); setTimeout(function () { focusNextDomElementF(); }, 20); }; const isShowMoreSearchResultsButton = computed(() => { return scopeTotal.value > 10; }); const formattedSuggestions = computed(() => { if (suggestions.value && suggestions.value.length) { const qTrimmed = uicontrol.value.q?.replace(/\s+$/, ''); const qLastKeyword = _.chain(qTrimmed?.split(/[ ]/)).last().value(); // const __result = _.chain(suggestions.value).first(6).map(function (x) { const __r = (scopeTotal.value > 0) ? ((qTrimmed !== '') ? (qLastKeyword !== '' && qTrimmed.toLowerCase().indexOf(qLastKeyword.toLowerCase()) > -1 && x.toLowerCase().indexOf(qLastKeyword.toLowerCase()) > -1) ? qTrimmed.substr(0, qTrimmed.toLowerCase().lastIndexOf(qLastKeyword.toLowerCase())) // fusepended : (qTrimmed + ' ') // appended : '' ) : ''; return { literal: __r + x, pre: __r, suggn: x }; }).value(); return __result; } return []; }); // When clicked on any suggestion, immediately empty the suggestion candidates so the suggestion panel disappears OR const formattedSuggestionClickedF = function (w00t) { //console.log('formattedSuggestionClickedF', w00t); if (w00t) { //suggestions.value = []; if (globalsearchboxdomref.value) { globalsearchboxdomref.value.focus(); } uicontrol.value.q = w00t; } }; //@change="searchboxHandleInputF" const searchboxHandleInputF = () => { }; const searchboxHandleEscKeyUpF = (evt) => { }; const searchboxHandleDownKeyUpF = () => { if (facetCountDir.value && facetCountDir.value.length || quicksearchitems.value && quicksearchitems.value.length || suggestions.value && suggestions.value.length) { focusNextDomElementF(); } }; const catsLiHandleUpKeyDownF = (e) => { focusPreviousDomElementF(); }; const catsLiHandleDownKeyDownF = (e) => { focusNextDomElementF(); }; const catsLiHandleLeftKeyDownF = (e) => { focusPreviousDomElementF(); }; const catsLiHandleRightKeyDownF = (e) => { focusNextDomElementF(); }; const catsLiHandleEnterKeyPressF = (e) => { const aEle = e.target?.querySelector('a'); if (aEle) { aEle.click(); e.preventDefault(); } }; const quicksearchLiHandleUpKeyDownF = (e) => { focusPreviousDomElementF(); }; const quicksearchLiHandleDownKeyDownF = (e) => { //COMMENT: do not cycle to cross btn //focusNextDomElementF(); if (e.target.nextElementSibling) { e.target.nextElementSibling.focus(); } }; const quicksearchLiHandleLeftKeyDownF = (e) => { if (globalsearchboxdomref.value) { const _gsbdilen = globalsearchboxdomref.value.value.length; globalsearchboxdomref.value.setSelectionRange(0, _gsbdilen); globalsearchboxdomref.value.focus(); } }; const quicksearchMoreResultsLiHandleEnterKeyPressF = (e) => { if (searchPageUrl) { top.location = searchPageUrl + '?q=' + uicontrol.value.q; e.preventDefault(); } }; //@keyup.up="suggestionLiHandleUpKeyDownF" const suggestionLiHandleUpKeyDownF = (e) => { if (e.target.previousElementSibling) { e.target.previousElementSibling.focus(); } else if (globalsearchboxdomref.value) { globalsearchboxdomref.value.focus(); } }; //@keyup.down="suggestionLiHandleDownKeyDownF" const suggestionLiHandleDownKeyDownF = (e) => { if (e.target.nextElementSibling) { e.target.nextElementSibling.focus(); } }; //@keyup.left="suggestionLiHandleLeftKeyDownF" const suggestionLiHandleLeftKeyDownF = (e) => { globalsearchboxdomref.value?.focus(); }; //@keyup.backspace="suggestionLiHandleBackspaceKeyDownF" const suggestionLiHandleBackspaceKeyDownF = (e) => { //debouncedSuggestionPanelOpenCloseF(false); globalsearchboxdomref.value?.focus(); }; const closeSuggestionClickedF = () => { //suggestionPanelCloseLock.value = true; //debouncedSuggestionPanelOpenCloseF(false); globalsearchboxdomref.value?.focus(); }; const toggleSuggestionClickedF = () => { globalsearchboxdomref.value?.focus(); }; const quicksearchLiHandleEnterKeyPressF = (e) => { const aEle = e.target?.querySelector('a'); if (aEle) { aEle.click(); e.preventDefault(); } }; return { isInitializing, isLoading, //showOverlayF, //closeOverlayF, globalsearchoverlayDOM, globalsearchboxdomref, globalsearchitemsdomref, globalsearchcatsdomref, globalsearchsuggdomref, queryoflastresult, uicontrol, scopeTotal, facetCountDir, facetCountDir_top4, facetCountDir_excepttop4, isMoreFacetsVisible, searchboxHandleInputF, searchboxHandleEscKeyUpF, searchboxHandleDownKeyUpF, suggestionLiHandleUpKeyDownF, suggestionLiHandleDownKeyDownF, suggestionLiHandleLeftKeyDownF, suggestionLiHandleBackspaceKeyDownF, catsLiHandleUpKeyDownF, catsLiHandleDownKeyDownF, catsLiHandleLeftKeyDownF, catsLiHandleRightKeyDownF, catsLiHandleEnterKeyPressF, quicksearchLiHandleUpKeyDownF, quicksearchLiHandleDownKeyDownF, quicksearchLiHandleLeftKeyDownF, quicksearchLiHandleEnterKeyPressF, quicksearchMoreResultsLiHandleEnterKeyPressF, expandMoreFacetsF, toggleSuggestionClickedF, isOverlayVisible, isOverlayVisibleDeferred, closeGlobalSearchOverlayF, quicksearchitems, formattedSuggestions, formattedSuggestionClickedF, isShowMoreSearchResultsButton, }; } }