Feature 1 Voice Intercom: Having installed this wireless doorbell, you can have easier audio communication, which will improve the overall safety. 2 Self Powered Work: Self powered design doesn't require batteries, and when you press the button, the receiver will ring automatically. 3 Very Clear Sounds: The speaker ensures good sound quality and clear sounds that can cover up to 200m, evenly the elderly can hear. 4 Wider Application: Allows for wide application in various occasion, including but not limited to office, hospital, baby room and so on. 5 Easy Installation: No need for wiring or hole drilling, the wireless door bell can be conveniently installed within several minutes.Item Type: Wireless DoorbellMaterial: ABSColor: WhiteWeight: 145 g / 5.11 oz(approx.) Package List1 x Wireless Doorbell1 x Receiver1 x Back Sticker1 x English User Manual