【Easy to install】：Easy for installation and no need for wires. It comes with double-sided adhesive and can be glued directly to the security door. The rear cover has a screw hole that can be fixed to the wall. 【Digital doorbell】： Wireless Door Bell for Home 1 remote button and 2 plugin receiver, you can install the receiver in two different places. 【Longer Range】：The Remote Control Door Bell distance is up to 100M, and the same digital doorbell is used in 1 range, and it will not interfere with each other! 【32 Different Tones】： Door Bell with 32 music ringtones, with LED light flashing when the doorbell ringing, remind the elder who can't hear and hearing-impaired to know that the doorbell is ringing. After installing the battery, if you want to select the ringtone, please Press the select tone button in the receiver to change the ringtone. 【DIY】Wireless doorbell DIY is strong, can be equipped with 1, 1 with 2, two with two, more with more, can be downstairs, there are also upstairs; living room, there are also inside the house, the door is not afraid to hear the ringtone, Don't miss a chance to welcome.