1. Power dc 12v (12v 23a battery, not included).
2. Standby currents: less than 3ua.
3. Alarm current: less than 15ma.
4. Wireles transmitting distance: less than 80m (open area/ no-interfering).
5. Wireless transmitting frequency: 433mhz.
6. Case material: abs plastics.
7. Operating temperature: -10 ~55 degrees.
8. Operating humidity: less than 80% (no coagulation).
9. Transmitters size: 3.3x*6.8*1.29cm.