Feature:  -The launch distance in the open area 100-200m.  -Transmission power is large, transmission distance is far.  -Compatible with various alarm hosts.  -Sensitive and reliable.  -Easy installation.  -Long standby.    Specification:  -Frequency:433.92MHz;  -Standby Time:2 years;  -Working Temperature:-10-+60℃;  -Magnet Distance:≤1cm;  -Default Encoding:1527;  -Material: ABS;  -Standby current: < 40uA;  -Operating current: less than 100mA;  -Detection Angle: 10MM;  -Detection distance: 0.1 (m);  -Default Coding: 1527;    Note:  1.Use a screwdriver to apart the plate from cover through the opening slot in the botton ,then load 1*AAA battery.  2.LED light will flash every 3 seconds if lower battery.    Package included:  1 x wireless door magnetic detector;  1 x small magnetic stripe;  2 x double-sided adhesive