2 Receiver 1 Transmitter 300M Wireless Remote Waterproof LED Indicator Digital DC Doorbell

Specification:  Weight: 50g;  Color: Black/White;  Volume:4 levels;  Ringtones:36 pcs;  Transmitter size:77*46*20mm;  Receiver size:95*65*24mm;  Transmitter battery type: 12 V 23A alkaline battery ( battery not included );  Receiver battery type: 3*AA batteries ( battery not included );  Waterproof grade: IP44;    Package Included:  1*Doorbell transmitter;  1*Doorbell receiver;  1*Double side tape;  1*Screw;