1. Model NO.:AK-200FC/C7 2. Gas detected:Carbon monoxide 3. Size:163mm*87mm*40mm 4. Working voltage: AC220V/AC110V、12VDC-20VDC 5. Backup battery：9V ordinary battery 6. Additional function：Linkage exhaust fan 7. Networking mode：Wired network connection function: (NO、NC) 8. Wireless networking model: 315MHZ/433MHZ (2262 OR 1527) 9. Product patent：200830103202.4