Wireless Door/Window Entry Detector.
->GSM/PSTN home alarm system.
->Condition: brand new.
->These sensors are used to protect the opening of doors and windows.
->Easily mounted by adhesive tape on window or door.
->Working frequency: 433MHz
->Power supply: 3V CR2032 battery
->Working distance: more than 80 meters (Open environment)
->Operating temperature: -30-50