1. Model: AK-200FC/C4 2. Electrochemistry type sensorú¿Japanú¬ 3. Gas detected: carbon monoxide 4. Sizeú¦100mm*35mm 5. Working voltageú¦AC220/AC110íó12VDC-20VDC 6. Additional Function: linked fans 7. Networkingú¦wired networkingú¿NOíóNCú¬ 8. Wireless networking modeú¦315MHZ/433MHZ (2262 OR 1527) 9. Patent number: 200830104026.6.