CACAZI Wireless Doorbell Waterproof - Black (1 Button / 1 Receiver) Backpack comfortable and stable to wear

comfortable and stable to wear without displacement

Not only is it long-lasting and does not fade after use

Black-Blue

the LED screen accurately displays the time and speed settings

CACAZI Wireless Doorbell Waterproof - Black (1 Button / 1 Receiver) Backpack comfortable and stable to wearOperation guide: 1. How to modify and lock music? Press and hold the volume button of the receiver before plugging in the power socket. Plug in the power socket until the light of the receiver lights up, release the volume button, press the music button to adjust to the favorite music ringtone, press and hold the volume button again until the light is on, press the transmitter twice immediately and the music is locked successfully. 2. How to pair