Customer Notice: Please note that we supply two options for installing the doorbell button, with 1) double-sided tape or 2) screws and anchors. Using the double sided tape is a temporary solution. We recommend the screws and anchors. Follow the easy installation instructions.Specifications:* Wireless Range: Up to 1000ft/300 Meters ( in the OPEN AIR ) super far remote control and receiving distance;* Tunes: 52 selectable options* Volume: 4 level adjustable levels (25db to 110 db)* Receiver Power: AC 110V ~ 220V 50Hz / 60Hz* Transmitter Power: 1 x 12V Alkaline Type A23 battery* Stability: Guarantee quality. Products adopt excellent inner materials that keeps itself from getting higher temperature & interference;* Inside: PCB board and IC parts are equipped with strong material, keeping long lifetime; Adopt digital coding it is more stable and can avoid interference;* Practical: Easy installation, convenient using, plug in socket and function normally; with double-side stickers at the back of the remote button, also you can use screw to fix it. It is easy to DIY; Indoor unit and outdoor unit can be freely matched; Super power-saving mode;Range of application:House, office, hotel service, community building, factory, construction site and other areas that is suitable for short-distance wireless environmentsPackage Includes:1*Transmitter ( A 12V 23A alkaline battery included )1* Receiver (AC powered)1*Double-sided adhesive tape2*Screws2*Anchors1*User Manual
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