Chuông cửa thông minh 300M 60 pin 1 2 nút AC 1 2 3 thu tín hiệu không dây có đèn LED

Features: Self-learning code function:choose your favorite music. Then Pairing method: New style pairing method: Hold down the music key for 5 seconds, (old style pairing method: press and hold the volume key for 5 seconds.) When you hear the dingdong and see the lights flash, immediately press the button, the signal is paired successfully. You can try 2 methods. 2.2 pairing 2 buttons 1 receiver requires another method. the pairing signal is very simple. Keep pressing the music button on the receiver. Then press2buttons multiple times and the signal is successfully paired. Compatible with 12V23A alkaline battery(NOT include battery) Receiving distance: 300 M (in open area) Volume: 3 files(can be mute) 0-110db, ringtones: 60pcs Transmitter size:75X51X20MM. Receiver size:95X65X24MM. Receivers Rated voltage : AC 110V-220V -240V. Working frequency: 433MHZ,can be customized other frequencie.