1、This electronic music doorbell alarm is a household essentials for security access control. 2、This wireless doorbell is easy to install, without dragging line 3、With long remote distance, which is more than 80m 4、Less power consumption, 2* AAA battery powered( not included) 5、Built-in 38 pieces sweet music to choose from, such as Ding-dong ding-dong, Ding-dong + hello, spring Ding Dong, etc, adding fun to life Descriptions: This electronic music doorbell alarm is a household essentials for security access control.Built-in 38 pieces sweet music to choose from, such as Ding-dong ding-dong, Ding-dong + hello, spring Ding Dong, etc, adding fun to life. Features: This electronic music doorbell alarm is a household essentials for security access control. This wireless doorbell is easy to install, without dragging line Remote control/receiving distance is more than 80m(open space) Less power consumption, 2* AAA battery powered( not included) Built-in 38 pieces sweet music to choose from, such as Ding-dong ding-dong, Ding-dong + hello, spring Ding Dong, etc, adding fun to life. LED indicator: press the button, the LED indicator light of the transmitter is on, the transmitter works, At the same time, the receiver receives the instruction and makes a nice music, which reminds you of the guest visit. At the same time, the" blue "led on the receiver are flashing regularly along with music Specifications: Working mode: wireless remote control Receiver operating voltage: DC 3V (2*AAA batteries)(not included) Power: ≤2W Working frequency: 315MHZ Remote control/receiving distance:≥80m Transmitter frequency: 315MHZ Transmitter operating voltage: 12V Transmitter working current : ≤15mA Receive size: 9.5 x 6.55 x 3cm / 3.74 x 2.58 x 1.18inch Transmitter size: 8x 4.5x2cm / 3.15 x 1.77 x 0.79inch Weight: 226g Package Included: 2 x Receive(battery not included) 1 x Transmitter(battery not included)