Chuông cửa điện tử không dây thông minh sử dụng pin F51(only doorbell button)

Package Included: 1*Doorbell button Specifications: Simple design, light and small, easy to install 32 music, the first is beautiful and beautiful, the volume is adjustable in four levels Strong penetrating power, long transmission distance, stable wireless signal Sensitive and easy to use, zero false positives, plug and play Doorbell button use: One battery can be used for more than 1 year The doorbell button uses 1 12V battery, Need to be used with the doorbell host Description: Steps to install the doorbell: 1. Plug the doorbell host well 2. Tear off the double-sided tape behind the doorbell button 3. Stick the button on the door and the installation is complete