This wireless smart doorbell is good and suitable for commercial residential area, office, restaurant, club, etc. This set includes 2 receivers and 1 transmitter.<br><br><strong>Features:</strong><br>High quality ABS material, green environmental protection. Wireless installation, easy and convenient.<br>Wireless smart doorbell system of 2 receivers and 1 transmitter.<br>Creative, waterproof design, preventing rainwater infiltration which can prolong service life.<br>36 chords included: pick one your favorite chime, and you can adjust the volume by pressing the key on the receiver.<br>Loud enough to hear at any of the 2 levels of volume.<br>Range up to 120 meters in the open air, suitable for home and high-rise buildings.<br>Fashionable light-operated blue LED light, intelligent and energy-efficient.<br>Suitable for commercial residential area, office, restaurant, club, etc.<br><br><strong>Specifications:</strong><br>Color: White + Blue<br>Material: ABS<br>Receiver:<br>Plug: EU Plug<br>Quantity: 2pcs<br>Voltage: AC 220-250V<br>Current: 100mA <br>Work frequency: 315MHz  <br>Volume: 75-110dB<br>Receiving Distance: 120m<br>Music: 36 Chords for Option<br>Transmitter:<br>Voltage: 12V(Battery: 23A 12V, Not included)<br>LED Indicator: Blue Light<br>Temperature: -10℃~50℃<br>Waterproof: Yes<br>Product Dimensions:<br>Receiver:(1pc) 115 * 75mm / 4.53 * 2.95in (L * W)<br>Transmitter: 75 * 40mm / 2.95 * 1.57in (L * W)<br>Product Weight:<br>Receiver: (2pcs) 175g / 6.18oz<br>Transmitter: 28g / 1oz<br>Package Size: 24.5 * 17.5 * 7cm / 9.64 * 6.89 * 2.75in (L * W * H)<br>Package Weight: 269g / 9.5oz<br><br><strong>Package List:</strong><br>1 * Transmitter<br>2 * Receivers<br>2 * Adhesive Tapes<br>2 * Screws