The Door Entry Alert Chime Idea is When Someone Open the door/Window, the Sensor will activate the Chime to Alert. It is used as Entrance/Entry/Intruder Alert Chime at Retail Home Office store.
Receiver has 55 Ring Tones for your Choice.Operating Range is 500+ Feet in open Area .5 Levels Adjustable Volume From 0db to 110db.Also have LED Night Light Feature. The Night Light can be Switch On or Off Freedom.
Easy Use ( 12V 23A Battery ) . The door/window open sensor fixed with Double-sided Adhesive Tape.
The receiver is Expandable to work with 55pcs of Sensors/Transmitters at Most .Also each Sensor/Transmitter can work with multiple receivers.
2 Receivers can be placed in different places(like base floor ,second floor, Bedroom, kitchen etc), 2 door open sensors can be set in Entrance , windows, garage and so forth.