









🔔 Elevate your entryway with AVANTEK — where style meets unstoppable signal!
The AVANTEK CB-21 Wireless Doorbell offers a robust 1000-foot wireless range, 52 customizable melodies with 2 distinct transmitters, and a powerful 115 dB stereo sound output. Designed for durability with an IP55 waterproof rating and ultra-low power consumption lithium batteries lasting up to 3 years, it ensures seamless, weather-resistant operation. Easy to install with included mounting hardware and smart memory function, this doorbell is FCC, CE, and RoHS certified for quality and safety.









| 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. |
| Is Discontinued By Manufacturer | No |
| Color | 2 Transmitters Black |
| Material | ABS |
| Shape | Square |
| Thickness | 0.6 Inches |
| Power Source | AC & Battery |
| Voltage | 3 Volts |
| Installation Method | Self-Adhesive or Screw-In |
| Sound Level | 115 Decibels |
| Type of Bulb | LED |
| Plug Format | A- US style |
| Switch Style | Push button |
| Included Components | 1 × Plug-in receiver, 1 × User manual, 2 × Adhesive tape, 1 × Screwdriver, 4 × Screw, 4 × Anchor, 2 × Transmitter |
| Batteries Included? | No |
| Batteries Required? | No |
| Battery Cell Type | Lithium Manganese Dioxide |
| Average Battery Life | 3 years |
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