Wireless Doorbell 1 Button 1Receiver Wide Range Remote Control Smart Home Wireless Doorbell Features: touch] doorbell button doorbell button level is up to IP66,you can put it on the outdoor wall .And low power consumption, it can use about one year if press average 10 times a day. 58 ringtones for your option,you can select regularly,and don't feel bored.Avoid the same ring with the neighbors. Strong signal ,150m long Transmission. Long operating range can be up to 500ft(150m) in open space, great for large house including villas, apartment, offices, shops, warehouses, etc]. 4 levels] volume. You can turn down the doorbell when you need quiet at home to prevent] noise, and turn it up when it is noisy to prevent] inaudibility. Doorbell, alarm, welcome alarm . Easy to install. Just plug the receiver into power socket and attach the transmitter on door,you don't even necessarily have to make holes or damage anything. Product Product NameWireless Doorbell Operating voltage AC 100-240V Operating current < 100 Radio frequency: 433 MHz Operating temperature: -10-50 degrees Celsius Wireless distance: 150 meters (open area) Frequency: 433 MHz Operating Current: 8~15mA Operating Temperature:-10~50; Humidity:not more than 90 Battery:23A 12V (battery not included) Transmitting distance:< 80 meters Size:3.66*2.32*1.1*1.77*2.83*0.7in Weight:0.22lb Included: 1x Doorbell 1x Keypad