Description This item is manufactured with premium plastic material for durable and long-lasting use. This item comes with a doorbell receiver chime and a remote controlled button transmitter for your convenience, and long remote range of 50-100 meters in open air ensures you to hear the bell and answer the door in time. High-quality voice processing technology integrate with 36 tunes for your preference. The doorbell is applicable for home, apartment, hotels, office and other places. Choose one to make your life easier and more convenient. Features - operating range of 120 meters in open air, which makes it easier to hear the doorbell no matter where you are in your home, you can take the transmitter throughout your home and won't miss a visitors arrival.- Great for commercial places, factories, hotels and offices, also work well for large homes or villas.- Energy saving and eco-friendly design, the push button transmitter battery inside can last for one year (20 presses per day).- Multi-function. With 36 Chime tones for your choice. Volume can be adjusted according to your own needs.- Easy to use. Just press the doorbell button of the transmitter to transmit signal to the receiver, if visitor enters, the LED of the receiver will regular flashes along with the music. LED light will flash according to the rhythm of music. Specifications - Color: White- Material: Plastic.- Size (Doorbell Receiver): Approx. 9.5 x 5.5 x 2.5 cm/ 3.17 x 2.17 x 0.98 inch (L x W x H).- Size (Doorbell Transmitter): Approx. 7.5 x 3.6 x 2 cm/ 2.95 x 1.42 x 0.79 inch (L x W x H).- Doorbell Receiver battery: 2 x AAA batteries (Not included)- Doorbell Transmitter battery: 1 x 12V 23A battery (included)- Receiver working voltage: DC3V- Transmitter working voltage: DC12V- Power: 2W- Working frequency: 315MHZ- Tunes: 36 options- / receiver distance: 120m (393 foot) without obstaclePacking list: 1 x Smart Wireless Doorbell Cordless 36 Chimes Door Bell LED Indicator for Home Security1 x Remote Push Button (Transmitter)1 x 23A 12V Alkaline battery for transmitter1 x Outer package