{"id":4401,"date":"2026-04-03T13:53:05","date_gmt":"2026-04-03T11:53:05","guid":{"rendered":"https:\/\/race-drones.com\/?post_type=product&#038;p=4401"},"modified":"2026-10-24T17:00:27","modified_gmt":"2026-10-24T15:00:27","slug":"jhe42b_s-finder-buzzer","status":"publish","type":"product","link":"https:\/\/race-drones.com\/he\/product\/jhe42b_s-finder-buzzer\/","title":{"rendered":"JHEMCU JHE42B-S Finder &#8211; Self-Powered Lost Drone Buzzer"},"content":{"rendered":"<h3>JHEMCU JHE42B-S Finder &#8211; Self-Powered Lost Drone Buzzer<\/h3>\n<p>The <strong>JHEMCU JHE42B-S Finder<\/strong> is a self-powered buzzer that helps you find a crashed or lost FPV drone. It works as a normal flight controller buzzer, and if the main battery is ejected or cut off in flight, it keeps sounding a loud 100dB alarm with a white LED on its own internal power.<\/p>\n<h3>Two Modes in One Buzzer<\/h3>\n<ul>\n<li><strong>Normal buzzer mode:<\/strong> works like a standard active buzzer, in sync with your flight controller.<\/li>\n<li><strong>Finder mode:<\/strong> when the flight controller loses power, for example when the battery ejects in a crash, the JHE42B-S Finder waits 30 seconds and then sounds a 100dB alarm and lights its white LED until you find the drone.<\/li>\n<\/ul>\n<h3>Key Features<\/h3>\n<ul>\n<li><strong>Self-powered:<\/strong> it charges itself from the flight controller while the quad is powered, so it keeps working after a power cut.<\/li>\n<li><strong>Loud and visible:<\/strong> a 100dB alarm and a white LED make a lost drone easy to find.<\/li>\n<li><strong>Plug and play:<\/strong> connect it to the buzzer pad of any Betaflight, Cleanflight or iNav flight controller, no setup needed.<\/li>\n<li><strong>Tiny and light:<\/strong> 18 x 17 x 15mm and only 4.3g, so it fits in almost any build.<\/li>\n<li><strong>Charging status LED:<\/strong> red while charging, off when full, flashing when the flight controller is powered off.<\/li>\n<\/ul>\n<h3>How to Turn Off the Alarm<\/h3>\n<p>Press and hold the release button for more than 2 seconds and the JHE42B-S Finder stops the sound.<\/p>\n<h3>Specifications<\/h3>\n<ul>\n<li><strong>Alarm:<\/strong> 100dB, starts 30 seconds after power loss<\/li>\n<li><strong>LED:<\/strong> white (finder mode), red (charging status)<\/li>\n<li><strong>Compatibility:<\/strong> Betaflight, Cleanflight and iNav flight controllers (buzzer pad)<\/li>\n<li><strong>Size:<\/strong> 18 x 17 x 15mm<\/li>\n<li><strong>Weight:<\/strong> 4.3g<\/li>\n<\/ul>\n<h3>Package Includes<\/h3>\n<ul>\n<li>1 x JHEMCU JHE42B-S Finder<\/li>\n<li>1 x 3-pin 1.0mm cable<\/li>\n<\/ul>","protected":false},"excerpt":{"rendered":"<h3>JHEMCU JHE42B-S Finder &#8211; Self-Powered Lost Drone Buzzer<\/h3>\n<p>The <strong>JHEMCU JHE42B-S Finder<\/strong> is a self-powered buzzer that helps you find a crashed or lost FPV drone. It works as a normal flight controller buzzer, and if the main battery is ejected or cut off in flight, it keeps sounding a loud 100dB alarm with a white LED on its own internal power.<\/p>\n<h3>Specifications<\/h3>\n<ul>\n<li><strong>Alarm:<\/strong> 100dB, starts 30 seconds after power loss<\/li>\n<li><strong>LED:<\/strong> white (finder mode), red (charging status)<\/li>\n<li><strong>Compatibility:<\/strong> Betaflight, Cleanflight and iNav flight controllers (buzzer pad)<\/li>\n<li><strong>Size:<\/strong> 18 x 17 x 15mm<\/li>\n<li><strong>Weight:<\/strong> 4.3g<\/li>\n<\/ul>","protected":false},"featured_media":4400,"comment_status":"open","ping_status":"closed","template":"","meta":{"om_disable_all_campaigns":false,"_monsterinsights_skip_tracking":false},"etheme_brands":[],"product_brand":[],"product_cat":[122],"product_tag":[1419,1413,1627,1418,1414],"giftcard-category":[],"class_list":["post-4401","product","type-product","status-publish","has-post-thumbnail","product_cat-other","product_tag-betaflight-buzzer","product_tag-fpv-buzzer","product_tag-jhemcu","product_tag-micro-drone-buzzer","product_tag-self-powered-buzzer","first","instock","taxable","shipping-taxable","purchasable","product-type-simple"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.7 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>JHEMCU JHE42B-S Finder - Self-Powered FPV Lost Drone Buzzer<\/title>\n<meta name=\"description\" content=\"Buy the JHEMCU JHE42B-S Finder self-powered buzzer. A 100dB alarm and LED keep going after the battery ejects. For Betaflight, iNav and Cleanflight.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/race-drones.com\/he\/product\/jhe42b_s-finder-buzzer\/\" \/>\n<meta property=\"og:locale\" content=\"he_IL\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"JHEMCU JHE42B-S Finder - Self-Powered FPV Lost Drone Buzzer\" \/>\n<meta property=\"og:description\" content=\"Buy the JHEMCU JHE42B-S Finder self-powered buzzer. A 100dB alarm and LED keep going after the battery ejects. 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