 Model: AK-200FC/H2  Gas detected: Gas, LPG, H2  Size: 86mm*86mm*60mm  Working voltage: 220 VAC /110 VAC、12VDC-20VDC  Additional Function: shut-off valve  Networking: wired networking（NO、NC）  Patent NO.: 200830103202.4  Wireless networking mode: 315MHZ/433MHZ (2262 OR 1527)