About This

• Note: Due to a chip upgrade, this transmitter may not pair with batches of receivers manufactured prior to June 2021. Please contact us to confirm this before purchase.
• This transmitter can be paired with the following AVANTEK doorbells with plug-in receivers: CB-11, CW-11, CB-12, CW-12, CB-21, CW-21, D-3B, D-3W, D-3G, D-3F, D-3C, and DB-21
• Expandable Doorbell System: Only compatible with your AVANTEK doorbell system with a maximum of 2 transmitters and multiple plug-in receivers; it’s a simple, hassle-free solution for your front and back door, so you’ll never miss a visit
• Effortless Installation: Simply place the transmitter on your wall with the double-sided adhesive tape or the screws and anchors included in the package
• IP55 Waterproof: High waterproof rating of IP55 and functional between -4°F (-20°C) to 140°F (60°C) to operate in even the harshest weather conditions
• Low Power Consumption: This transmitter uses a 230 mAh lithium battery with an ultra-long 3-year lifespan, eliminating the hassle of frequently buying batteries.