Meco Battery-Free Self-Powered Wireless Remote Control Doorbell WithTransmitter

How to pair? 1. Press the music button for over 3 seconds. 2. When the indicator light flash slowly, release the music button and get into the signal pairing state. 3. Press the corresponding transmitter twice continusously then the transmitter get into working state. How to clear? Press the music button for 10 seconds, the indicator light flashes rapidly. Release the button, then you will see the transmitter can't control teh receiver. ( The clear procedure can delete all the pairing all the pairing information in the receiver.) Note: 1. If you need other transmitter to controll the same receiver, just repeat the above steps. 2. Ensure no other pairing within 100 meters to avoid interference. 3. Please allow 1-3mm errors due to manual measurement. 4. Due to the difference between different monitors, the pictures may not reflect the actual color of the item. Specification: Input voltage: AC 85~265v 50/60Hz Transmitter style: Push button Transmitter power mode: Self-powered/ Battery-free Receiver standby power: < 0.5w Remote control range: indoor 30 meters (be able to penetrate the wall); outdoor 100 meters. Frequency band: 433MHz Operating temperature: -25C to 50C Transmitter lifetime: 200000 clicks Battery required: No Number of songs: 48 songs(Default: Ding-Dong) Volume range: 6 grade(including silence) Receiver model: EU, US Transmitter dimensions: 70x15.5mm Receiver dimensions: 94x53x34mm Package includes: 1 x Transmitter 1 x Receiver 1 x Sticker 2 x Screws 1 x User manual Details pictures: