The gas&carbon monoxide alarm can detect both of carbon monoxide and gas leakage. there are two sensors in it.it is a ideal safety products for home secuirity usingHot wire type sensor Power110VAC/220VAC/230VAC 9V-20DCInterconnecting Circuit for normally closed relay contactsCircuit for normally opened relay contactOperating Frequency433 MHz/315MHz (optional)Size: 115mm*70mm*40mmWeight: 300g/PCSPackage size: 58.5cmX28.5CmX53.3cm Quantity/Box: 100PCS CtnWei(kg): 35kg
