CallToU Door Chime,Wireless Door Sensor with 55 Chimes 5 Adjustable Volume Mute Mode for Business/Home/Store,Door Open Alert with 1000ft Range LED Indicators calling system Expandable with up to 20

Expandable with up to 20 call buttons and unlimited receivers for complete coverage of every location in your house

It transmits the signal to receivers within the 980ft/300m operating range

and the other side will be not allow to speak

football games

Wear Comfortably

CallToU Door Chime,Wireless Door Sensor with 55 Chimes 5 Adjustable Volume Mute Mode for Business/Home/Store,Door Open Alert with 1000ft Range LED Indicators calling system Expandable with up to 20Product Description Easy to InstallThe sensor and receiver are paired already,Just plug the receiver into standard outlet, tear the double side adhesive tape of the door window sensor and stick them to any door or window. Long Range & ExpandableThe door chime wireless door sensor has 1000feets far enough to cover every door in your house or store. And each door opening chime for business can be paired unlimited magnetic sensor, you can also pair