1. Model: AK-200FC/C2 2. Sensor: Electrochemical (Japan) 3. Gas detected: Carbon monoxide 4. Working voltage: AC220V/AC110V 12VDC-20VDC 5. backup batteries: 3 AA alkaline batteries or Rechargeable battery pack 6. Additional Function: linked fans 7. Wireless networking: 315MHZ(2262or1527) 8. Patent NO:200830103203.9 9. Working temperature: -40degree~80 degree