Features:  1. Using ultra-low power program-controlled processing technology.  2. Using the No. 2 AA general-purpose battery, it is easy to buy, and the battery life exceeds 2 years.  3. Automatic status report.  4. Timed reports of doors and windows not closed properly.  5. Anti-disassembly alarm.  6. Wireless transmission frequency 433.92.  7. The wireless transmission distance is 150m.  8. Built-in antenna design, exquisite and exquisite.  9. Transmission method: wireless transmission.  10. Alarm output: alarm report, tamper report.     Specification:  Working voltage: 3V (2 AAA alkaline batteries) ( Not Included Batteries );  Wireless transmission distance: ≥150 meters (open space);  Transmission frequency: 433.92MHZ/315MHZ/868.4MHZ (optional);  Launch agreement: 1527;  Static current: ≤12μA;  Emission current: ≤15mA;  Working environment: -10℃-50℃ (14℉-122℉);  Tamper-proof switch: normally closed;  Single weight: 50g;  Product size: 72*30*19mm / 45.5*15.5*14mm;     Introduction:  The wireless door magnetic detector detects whether the door, window, drawer, etc. have been opened illegally. It is mainly used in pair with the 'alarm host'. When the host is out of the armed state, when the door, window, or the door is opened illegally, the wireless door magnetic detector sends an alarm The signal is sent to the 'alarm host', the host sends an alarm, and the wireless signal of the wireless door sensor is transmitted 200-300 meters between the open space and the host.    Package Includes:  1 * Door and Window Sensor