AVANTEK CB-21 Wireless Doorbell - 52 Melodies, 1000ft Range, Waterproof
🎵 52 Melodies - With a symphony of chimes at your fingertips, picking the perfect tune for your doorstep has never been easier. Whether you're into classic dings or something more modern, we've got you covered.
🏠 1000ft Wireless Range - Imagine this: you're in the backyard, lost in your favorite book, and—ding dong!—you hear the doorbell clear as day. That's the magic of our extended range, ensuring you're always in the loop, no matter where you are at home (or even in the office).
🌧️ IP55 Waterproof - Rain or shine, this doorbell stands its ground. It's like the postal service of doorbells—nothing stops it from delivering (except maybe a power outage, but we've got that covered too).
🔊 115dB Loud Sound - Loud enough to wake the neighbors? Maybe. But definitely loud enough to cut through the chaos of a busy household or to be heard by those who might need a little extra volume. Consider it your auditory lifeline.
⚡ Memory Function - Because who has time to reset their doorbell after every power outage? Not you. Our doorbell remembers your preferences, so you can pick up right where you left off—no fuss, no muss.
🔋 Long Battery Life - Three years on a single battery? That's right. We're not just saving you time; we're saving you from the dreaded 'low battery' chirp that haunts your dreams. Set it and forget it—until 2026, at least.
General specs
- Brand: AVANTEK
- Model: CB-21
- Seller: Amazon
- Manufacturer: AVANTEK
- Part Number: CB-21
- Item Weight: 6.4 ounces
- Product Dimensions: 2.8 x 0.6 x 3.1 inches
- Batteries: 2 CR2 batteries required.
- Material: ABS
- Shape: Square
- Power Source: AC & Battery
- Voltage: 3 Volts
- Sound Level: 115 dB
- Type of Bulb: LED
- Included Components: 1 × Plug-in receiver, 2 × Transmitter, 1 × User manual, 2 × Adhesive tape, 1 × Screwdriver, 4 × Screw, 4 × Anchor
- Average Battery Life: 3 years
If you are interested in more details, you can find full information on the seller's page.
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Comparison with similar products
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![]() AVANTEK CB-11
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Brand | AVANTEK | AVANTEK | AVANTEK | AVANTEK | AVANTEK | AVANTEK |
Model | CB-21 | D-3F | D-3W | CW-21 | LD-CB-12-A | CB-11 |
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Price | $24.99 | $13.94 | $19.95 | $25.99 | $27.99 | $12.94 |
Seller | Amazon | Amazon | Amazon | Amazon | Amazon | Amazon |
Update | May 13, 2025 | May 13, 2025 | May 13, 2025 | May 12, 2025 | May 12, 2025 | May 13, 2025 |
Manufacturer | AVANTEK | AVANTEK | AVANTEK | |||
Part Number | CB-21 | LD-D-3F-A | D-3W | LD-CB-11-A | ||
Item Weight | 6.4 ounces | 6.2 ounces | 10 ounces | 5 ounces | ||
Product Dimensions | 2.8 x 0.6 x 3.1 inches | 5.28 x 4.21 x 2.44 inches | 7.72 x 2.32 x 4.21 inches | 2.8 x 0.6 x 3.1 inches | ||
Batteries | 2 CR2 batteries required. | 1 CR123A batteries required. (included) | 1 CR2 batteries required. | 2 CR2 batteries required | 1 CR2 batteries required. (included) | |
Power Source | AC & Battery | Battery Powered | AC & Battery | |||
Voltage | 3 Volts | 3 Volts | 3 Volts | 3 Volts | ||
Sound Level | 115 dB | 115 dB | 115 dB | 115 dB | ||
Included Components | 1 × Plug-in receiver, 2 × Transmitter, 1 × User manual, 2 × Adhesive tape, 1 × Screwdriver, 4 × Screw, 4 × Anchor | Transmitter, Receiver, Adhesive tape, Screwdriver, Screws, Anchors | 2 Plug-in receivers, 1 Adhesive tape, 1 Screwdriver, 2 Screws, 2 Anchors, 1 Transmitter, 1 User manual | |||
Average Battery Life | 3 years | 3 years | 3 years | 3 years | ||
Country of Origin | China | China | China |