1. Model: AK-200FC/H2 2. Gas detected: Gas, LPG, H2 3. Size: 86mm*86mm*60mm 4. Working voltageú¦ 220 VAC /110 VACíó12VDC-20VDC 5. Additional Function: shut-off valve 6. Networkingú¦wired networkingú¿NOíóNCú¬ 7. Patent NO.: 200830103202.4 8. Wireless networking modeú¦315MHZ/433MHZ (2262 OR 1527) 9. Specific characteristic: (1) long service life (2) Our alarms have been solved the phenomenon of sensor drift which can prevent the alarms from false alarm or omission. (3) Automatic diagnosis, error warning and prompt functions.