Hi,my dear angel, welcome to Jacenvly, our products are cheap and good quality, price is fair, you can't miss it. If this product is not your style, please click on our store, we have many kinds of products, there will be you like and suits you. If you have any questions about your purchase, please send us the first message, we offer world class customer service to make your purchase without your worries. Have a nice day. Doorbell Wireless Chime Home Doorbell Intelligent 61 Songs Smart Doorbell Alarm With Battery 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. 61 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 Description: Product Name：Wireless 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 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. 61 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.