... : 110mm x 69 x 36mm11Weight: 270gInstallation Instructions:1),The gas detector should be installed at the position of 1.5 meters ... , and well-ventilated place2),If the gas is heavier than the air, the gas detector should be installed higher 0.3m than the ... lighter than the air,the gas detector should be installed lower 0.3m than the ceiling.Packing:110pcs/ctn Wireless LPG detector Gas Leak Alarm