Hi, Dear little 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. Household Wireless Digital Remote Control Doorbell Elderly Pager Music Doorbell Pager Features: Wireless Doorbell Door, rated to IP66, can be placed on an outdoor wall and has a low power consumption, an average of 10 presses per day will last you about a year. With 36 ringtones for you to choose from, you can choose regularly without getting bored. Strong signal, transmission distance up to 300 meters. In the open space, the working distance can 500 feet (150 meters), perfect for big houses, including villas, apartments, offices, stores and so on. 4 Volume Levels, Maximum 100 dB.You can turn the doorbell volume down to reduce noise when your home needs to be quiet, and turn it up to hear more clearly when it's noisy. Doorbell, Siren, Welcome Alarm. Easy to install. Simply plug the receiver into an electrical outlet and mount the transmitter on the door, no need to a hole or damage anything. Product Description: Product Name：Wireless Doorbell Colors:Black,Silvers,Gold Power supply: 12V23A alkaline battery 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:3.74*2.44*0.98*3*0.78*1.81in Weight:0.27lb Included: 1x Doorbell 1x Keypad Features: Wireless Doorbell Door, rated to IP66, can be placed on an outdoor wall and has a low power consumption, an average of 10 presses per day will last you about a year. With 36 ringtones for you to choose from, you can choose regularly without getting bored. Strong signal, transmission distance up to 300 meters. In the open space, the working distance can 500 feet (150 meters), perfect for big houses, including villas, apartments, offices, stores and so on. 4 Volume Levels, Maximum 100 dB.You can turn the doorbell volume down to reduce noise when your home needs to be quiet, and turn it up to hear more clearly when it's noisy. Doorbell, Siren, Welcome Alarm. Easy to install. Simply plug the receiver into an electrical outlet and mount the transmitter on the door, no need to a hole or damage anything.