10PCS Waterproof LED Wireless Doorbell Remote Control Door Bell With 36 Tune Chimes Songs

Product specifications:
Receiver: 2 × AAA batteries
Transmitter: 1 12V23A battery (supplied)
Weight: 120G/PC
Usage: After installing the battery, pull the receiver switch to the sound selection (double arrow) position (change the ring tone every time you press the shot, if you want to fix a certain music, pull the switch to the fixed position (music symbol) Can be fixed