{"id":12595,"date":"2023-11-19T03:02:07","date_gmt":"2023-11-19T03:02:07","guid":{"rendered":"https:\/\/kawasan.123websitedev.com\/san-pham\/cua-tu-khong-day-m4\/"},"modified":"2026-09-25T13:54:03","modified_gmt":"2026-09-25T06:54:03","slug":"cua-tu-khong-day-m4","status":"publish","type":"product","link":"https:\/\/kawasan.vn\/en\/product\/cua-tu-khong-day-m4\/","title":{"rendered":"M4 Wireless Magnetic Door Sensor \u2013 Accessory for Central Alarm System"},"content":{"rendered":"<h2>M4 WIRELESS MAGNETIC DOOR SENSOR<\/h2>\n<p>M4 s\u1eed d\u1ee5ng c\u00f4ng ngh\u1ec7 c\u1ea3m \u1ee9ng c\u1eeda t\u1eeb v\u00e0 k\u1ebft n\u1ed1i kh\u00f4ng d\u00e2y b\u1eb1ng s\u00f3ng RF433 Mhz. \u0110\u1ed9 nh\u1ea1y cao, \u0111\u1ea7u c\u1ea3m \u1ee9ng t\u1eeb s\u1eed d\u1ee5ng Pin Lithium CR2023(\u0111i k\u00e8m SP).<\/p>\n<p>C\u00f3 th\u1ec3 t\u00edch h\u1ee3p c\u1eeda t\u1eeb v\u1edbi <a href=\"https:\/\/thegioidienthongminh.com\/danh-muc\/chuong-cua-chuong-bao-khach\/\">visitor chime<\/a>, <a href=\"https:\/\/kawasan.vn\/en\/product-category\/thiet-bi-bao-dong\/\">central alarm system<\/a>, or central alarm siren via RF433MHz.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-full wp-image-16833\" src=\"https:\/\/kawasan.vn\/wp-content\/uploads\/2026\/09\/1-1-3.png\" alt=\"\" width=\"800\" height=\"516\" srcset=\"https:\/\/kawasan.vn\/wp-content\/uploads\/2026\/09\/1-1-3.png 900w, https:\/\/kawasan.vn\/wp-content\/uploads\/2026\/09\/1-1-3-768x768.png 768w, https:\/\/kawasan.vn\/wp-content\/uploads\/2026\/09\/1-1-3-640x640.png 640w, https:\/\/kawasan.vn\/wp-content\/uploads\/2026\/09\/1-1-3-400x400.png 400w\" sizes=\"auto, (max-width: 800px) 100vw, 800px\" \/><\/p>\n<h2 id=\"toc_cam-bien-cua-la-gi\"><strong>What Is a Door Sensor?<\/strong><\/h2>\n<p><strong>Door sensors<\/strong> also known as magnetic door sensors, are security devices used to detect unauthorized entry through doors or windows.\nA<\/p>\n<p><strong>Door sensors<\/strong> consists of 2 main components: a magnet installed on the door and a sensor unit installed on the door frame. The sensor communicates with the central alarm control panel. When unauthorized entry is detected, the control panel immediately activates an alarm siren or sends an alert via phone call or message, while indicating the location where the intrusion occurred.<\/p>","protected":false},"excerpt":{"rendered":"<p>C\u1eecA T\u1eea KH\u00d4NG D\u00c2Y M4 M4 s\u1eed d\u1ee5ng c\u00f4ng ngh\u1ec7 c\u1ea3m \u1ee9ng c\u1eeda t\u1eeb v\u00e0 k\u1ebft n\u1ed1i kh\u00f4ng d\u00e2y b\u1eb1ng s\u00f3ng RF433 Mhz. \u0110\u1ed9 nh\u1ea1y cao, \u0111\u1ea7u c\u1ea3m \u1ee9ng t\u1eeb s\u1eed d\u1ee5ng Pin Lithium CR2023(\u0111i k\u00e8m SP). C\u00f3 th\u1ec3 t\u00edch h\u1ee3p c\u1eeda t\u1eeb v\u1edbi chu\u00f4ng b\u00e1o kh\u00e1ch, b\u1ed9 b\u00e1o \u0111\u1ed9ng trung t\u00e2m, c\u00f2i h\u00fa trung [&hellip;]<\/p>","protected":false},"featured_media":16832,"comment_status":"open","ping_status":"closed","template":"","meta":{"_yoast_wpseo_focuskw":"C\u1eeda T\u1eeb Kh\u00f4ng D\u00e2y M4","_yoast_wpseo_metadesc":"C\u1eeda T\u1eeb Kh\u00f4ng D\u00e2y M4. C\u1ea3m \u1ee9ng c\u1eeda t\u1eeb v\u00e0 k\u1ebft n\u1ed1i kh\u00f4ng d\u00e2y b\u1eb1ng s\u00f3ng RF433 Mhz. \u0110\u1ed9 nh\u1ea1y cao, \u0111\u1ea7u c\u1ea3m \u1ee9ng t\u1eeb s\u1eed d\u1ee5ng Pin Lithium CR2023(\u0111i k\u00e8m SP).","_yoast_wpseo_focuskeywords":"","_yoast_wpseo_keyword_synonyms":""},"product_cat":[499,45],"product_tag":[1046,1045,1044,1043,1042,1041,743,744,748],"class_list":["post-12595","product","type-product","status-publish","has-post-thumbnail","hentry","product_cat-cua-tu-bao-trom-thong-minh","product_cat-phu-kien-bao-dong","product_tag-cam-bien-cua-bao-khach","product_tag-cam-bien-cua-canh-bao","product_tag-cam-bien-cua-chong-trom","product_tag-cam-bien-cua-gia-re","product_tag-cam-bien-cua-gia-tot","product_tag-cam-bien-cua-kawasan","product_tag-cam-bien-cua-tu","product_tag-cam-ung-cua-tu","product_tag-cua-tu"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v24.9 (Yoast SEO v24.9) - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>C\u1eeda T\u1eeb Kh\u00f4ng D\u00e2y M4 - Ph\u1ee5 Ki\u1ec7n B\u1ed9 Trung T\u00e2m - Kawasan<\/title>\n<meta name=\"description\" content=\"C\u1eeda T\u1eeb Kh\u00f4ng D\u00e2y M4. 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