With Socket Wireless Doorbell, you will always know when someone is coming up to your house before they ring the doorbell!Socket Style Intelligent Wireless Doorbell V008A. Wide range of USES, except used as a common outside, but also as a doorbell liaison, pager, patient care, emergency announcement special purposes. The Socket Wireless Doorbell installs in seconds with a screwdriver to your fence, mail box post, side of house, door molding, or a post in the ground. Intelligent Wireless Doorbell alerts you when someone crosses its path. When placed across the driveway or on your porch, a pleasant Intelligent Wireless Doorbell will sound alerting you that someone has come onto your property.This Digital Warning Doorbell is your best choice!