: Home Security Smart Chimes Door Alarm LED Light 38 Songs.Product Description: Just press the button, doorbell will receive the signal and you will hear the tunes immediately. remind you of the arrival of visitors.5 adjustable volume level: different sound sizes in different situations.Strong signal: Long operating range can be up to 100m in open space, perfect for home including villas, apartment, offices, stores, warehouses, etc.Easy to install: Just plug the receiver into socket and attach the transmitter on door, you 't even necessarily have to make holes or damage anything.Item Type: Wireless Frequency: 433MHzOperating Voltage (For ): AC220VBattery (Wireless Button): 3V CR2032 (Battery Not include)Plug Type :EU Plug,it applies to Indonesia, Germany, , Spain, and so on.Colour:WhiteMaterial:ABSPackage Contents:1 x 1 x button (3V CR2032 battery not include)Only the above package content, other products are not included.Note: Light reflection and different displays may the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.