Melody Musical Sound Cordless Wireless Intelligent Doorbell Remote Control Long Range Digital Receiver Doorbell Calling Bell for Home with LED Indicator 38 Songs

One transmitter and one receiver. Can adjust the volume with low/medium/high and down/up. 38 tunes for different sound each time and flashlight will shine. Long distance transmission and high strength signal and sensitivity. Easily install and operate. Effectively reminds you of the coming of guests or friends.