Coolqiya Wireless Doorbell Chime for Home with 1 Remote Waterproof Door Bell and 2 Plugin Receivers, 1000 Feet Long Range Transmission, No Battery Required for Receiver Over 50 Chimes

How to set the ring tones you want? (Note: They can maintain their settings when power is removed, no need to reset)A: You can pair transmitters with receivers to set the ring tones you need before you install the transmitters on the door frame. B: If you have installed your transmitters on the door frame, you can also change the ring tone you need, just use the mini screwdriver (included) to open the transmitter and take the front cover off, and then take it close to the receiver to pair them a ring tone. Here's how to pair transmitters with receivers one by one for a new code (for a ring tone). 1. Plug one receiver into a regular socket, and pick the sound you want on this receiver. 2. Press and hold the volume button on this receiver 5 seconds or so, then the receiver will blink with a "ding" sound. And then push the transmitter button at the same time (within 5seconds) to pair with the receiver. Finally, you will hear the music you set. 3. The operation method is the same to pair other transmitter buttons with receivers. What's Included 2 * Receivers; 1 * Transmitter; 1 * 12V 23A Alkaline Battery in Transmitter 2 * Screws & Anchors; 1 * Tiny Screwdriver 1 * Sticky Pads; 1 * User Manual