I. Functions Features:
1.Monitors open/closed status of the doors and windows. Generally set as Perimeter zone.
2. Sends signal to the alarm host if any door or window is opened. 
3. High capacity Li-ion rechargeable battery included.
4. With panic button function also. 

II. Specifications: 
1. Power supply: 3.7V/200mAh rechargeable Li-ion battery
2.Emission distance: greater than or equal to 150 meters (in open air)
3. Charging time: 12 h
4. Full loaded battery work time: less than or equal to 3 years
5. Alarm distance: less than 4cm 
6. Dimension: 65 * 30 * 17 mm

III. Installation and Usage:
1. Fix the part of magnet onto the door frame in a position of 1.6m above the ground to prevent any children from bumping onto it.
2. Fix the part of emitting onto the door frame, make sure to keep the part of magnet and part of emitting in parallel, the space between the two parts shall be less than 10mm.
3. Charge the door/window sensor when the Low Power Light flashes frequently in blue.
4. Press the "Emergency button", the alarm host would go to alarming mode