{"product_id":"avantek-cb-21-wireless-door-bell-1000-ft-range-52-melodies-dual-transmitters","title":"AVANTEK CB-21 Wireless Door Bell – 1000 ft Range, 52 Melodies, Dual Transmitters","description":"\u003cdiv\u003e\n  \u003ch2\u003eWhy the AVANTEK CB-21 Door Bell Stands Out\u003c\/h2\u003e\n  \u003cp\u003eIn a bustling home or small office, a doorbell should be reliable, flexible, and easy to use. The AVANTEK CB-21 delivers a crisp, room-filling chime with generous wireless reach and thoughtful customization. This system is designed to fit modern living spaces, from open concept main floors to multi-story layouts, offering practical features without overpromise.\u003c\/p\u003e\n  \u003ch3\u003eEasy setup, flexible coverage\u003c\/h3\u003e\n  \u003cul\u003e\n    \u003cli\u003eTwo transmitters are included, and you can add more AVANTEK CR-1\/RB-1 receivers to extend coverage without wiring.\u003c\/li\u003e\n    \u003cli\u003eWall-mount the transmitter in minutes using the included screws, anchors, adhesive pads, and a handy removal key for updates.\u003c\/li\u003e\n  \u003c\/ul\u003e\n  \u003cp\u003eWhether you’re in a single-family home or a compact condo, the CB-21 keeps visitors visible and alerts audible, without cluttering your space with cables.\u003c\/p\u003e\n  \u003ch3\u003eCrystal-clear sound and tonal variety\u003c\/h3\u003e\n  \u003cul\u003e\n    \u003cli\u003eThe 29 mm stereo speaker delivers rich, crisp tones that cut through common room noise.\u003c\/li\u003e\n    \u003cli\u003eChoose from 52 melodies and five volume levels, with a maximum of 115 dB for larger rooms or open layouts.\u003c\/li\u003e\n    \u003cli\u003eAssign different melodies to each transmitter so you instantly know which door is ringing.\u003c\/li\u003e\n  \u003c\/ul\u003e\n  \u003ch3\u003eDurability and dependable performance\u003c\/h3\u003e\n  \u003cul\u003e\n    \u003cli\u003eUltra-low power consumption with a lithium battery that can last up to three years under typical use.\u003c\/li\u003e\n    \u003cli\u003eIP55 dustproof and waterproof rating; operates across a wide temperature range from -4 °F to 140 °F for varied climates.\u003c\/li\u003e\n  \u003c\/ul\u003e\n  \u003ch3\u003eMemory and everyday convenience\u003c\/h3\u003e\n  \u003cp\u003eThe memory function preserves your last melody and volume level after a power outage, so the system returns to your preferred settings with minimal fuss.\u003c\/p\u003e\n  \u003cp\u003eIn short, the CB-21 blends long-range reliability, customizable tones, and durable design to suit diverse entry points in your home. It presents practical possibilities for smoother daily routines, without promising outcomes—instead, it invites you to explore tailored doorbell options that fit your space.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003csection class=\"product-faq-snippet\"\u003e\u003ch3\u003eFAQ\u003c\/h3\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: What is the wireless range of the AVANTEK CB-21 doorbell?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Up to 1,000 feet (300 meters) in open space; performance varies with walls and interference.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Can I expand coverage and customize tones?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Yes. Two transmitters are included; you can add more CR-1\/RB-1 receivers and assign different melodies per transmitter.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"AVANTEK","offers":[{"title":"Default Title","offer_id":53093256659055,"sku":"B07KCCF3NB","price":27.63,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0725\/0598\/3087\/files\/avanttek-cb21-wall-mount-transmitter.jpg?v=1778768094","url":"https:\/\/taskholt.com\/products\/avantek-cb-21-wireless-door-bell-1000-ft-range-52-melodies-dual-transmitters","provider":"TaskHolt","version":"1.0","type":"link"}