1. Model: AK-200FC/C5 2. Electrochemistry sensor（Japan） 3. Gas detected: carbon monoxide (The density of gas can be demonstrated.) 4. Size：163mm*87mm*40mm 5. Working voltage：AC220/AC110、12VDC-20VDC 6. Back-up battery：9V alkaline cell 7. Additional Function: linked fans 8. Networking：wired networking（NO、NC） 9. Patent NO.: 200830103202.4 10. Wireless networking mode：315MHZ/433MHZ (2262 OR 1527)