1. Model: AK-200FC/C3 2. Electrochemistry type sensor（Japan） 3. Gas detected: carbon monoxide 4. Size：100mm*35mm 5. Working voltage：AC220/AC110、12VDC-20VDC 6. Additional Function: linked fans 7. Networking：wired networking（NO、NC） 8. Wireless networking mode：315MHZ/433MHZ (2262 OR 1527) 9. Patent number: 200830104026.6