EECOO wireless doorbell is very easy to install, with a modern fashion compact design, it will bring a whole new level of convenience to your daily life. Perfect chose for homes, offices, shops, stores and etc. Main Features: * Waterproof push button with built-in 12V 23A battery, boasts over 12 months lifespan. * 94V-0 fireproof receiver won't burned and keep your outlet safe. * 60 chimes with 5 adjustable volumes from 0-85dB. * Silent mode with blue LED flash as aid for the elderly and hearing impaired. * Wireless range up to 300m/1000 feet. * Free paring for adding more same kind push buttons or receivers. How To Install The Transmitter? Method 1.Fix the backplane on the wall with adhesive tape or screws, then press it for 10 seconds. Method 2.Install it by screws, recommend!! How to pair the doorbell or change the chime ? You could change chimes by steps: 1. Plug the receiver into the power socket; 2. Press the chimes button on receiver to choose the melodies you want; 3. Press and hold the volume button for about 3-4 seconds, press the remote control twice after the receiver flashing Package Include: 1 x transmitter (battery included) 2 x plug-in receiver 2 x screws 1 x double side tape 1 x adhesive patch1 x user manual . Note:Please note that the new type and old type of this product will be sent randomly, and make sure you will not mind before ordering.