Wireless Doorbell: Home Security Smart Chimes Door Bell Alarm LED Light 38 Songs. 5 adjustable volume level: Choose different sound sizes in different situations. Product Description: Just the button, doorbell receive the signal and you hear tunes immediately. remind you of the arrival of visitors. Strong signal: Long operating range can be up to 100m in open space, perfect for large home including villas, apartment, offices, stores, warehouses, etc. 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. Size:5.5 x 9cm Plug Type:EU Plug,it applies to Indonesia, Germany, France, Spain, Italy and so on. Voltage: AC220V Color: As Shown Material: plastic Package Contents: 1 x wireless doorbell 1 x button Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.