The wireless door magneticdetects 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 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. Features: 1. Using ultra-low power program control processing technology; 2. Using general-purpose 2 batteries of No. 7 batteries, easy to purchase, and the battery lasts more than 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, beautiful and exquisite; 9. Transmission method: wireless transmission; 10. Alarm output: alarm report and tamper report. Specification: Working voltage: 3V (2 AAA alkaline batteries) (not included); Wireless transmission distance: ≥150 meters (open space); Transmission frequency: 433.92MHZ/315MHZ/868.4MHZ (optional); Launch agreement: 1527; Static current: ≤2μA; Emission current: ≤15mA; Working environment: -10℃-50℃ (14℉-122℉); Tamper switch: normally closed; Weight: 50g. Product size: 72 x 45.5 x 14mm. Product packaging size: 90 x 50 x 25 mm. Carton size: 43 x 29.5 x 16CM. Package included: 1 x Door Magnetic Sensor