Wireless Magnetic Door Alarm Sensor

Wireless Magnetic Door Alarm Sensor 
Tech Features:
Model No.: NT-MC01 Protect your doors, windows, sliding doors, sliding windows and cabinets, etc... 
Widely used in wireless home or business alarm system 
Static Current Consumption: ≤ 5 μA 
Emission Current: ≤ 15mA 
Operating Temperature: -10°C~50°C
Emission Distance: 100m (Open field) 
Decode: Fixed code by jumpers, learning code EV1527
Alarm time: 5 seconds 
LED Indication of alarm and low battery 
Built-in Battery: 23A-12V battery (included, useful life time 6-12 months) 
Size: 70mm x 40mm x 15mm (antenna not included) 
Emission Frequency: We can offer 315 MHz or 433 MHz, you can choose one. 
Oscillation resistor / Timing resistor : We can offer 1.2M, 1.5M, 1.8M, 2.2M, 3.3M or 4.7M, you can choose one
Installation:
Stick part A (magnetic bar) on the edge of a moveable door or window, and stick part B on the fixed doorframe or window frame.
Note: The distance of these two parts shall be less than 1-2 cm when the door or the window is closed.
Usages:
Pull out the antenna of the detector.
When the door or window is opened from the closed position, LED 1 will turn on red light for 5 seconds, the detector will be triggered and will send alarming signal to the main unit.
Indication of low battery: When the voltage of battery is less than 7.5V, LED 2 will straightly turn on red light. At this time, you must immediately change the battery.