AT-300 Natural Gas Sensitive Wireless Detector Alarm LPG Poisoning Warning Alarm Detector Independent Gas Detector Sensor Specifications: Model: AT-300 Power supply: AC 220V 50Hz Buzzer: 85dB Alarm concentration: 15%LEL Reset concentration: 8%LEL Operating temperature: -10~50 Relative humidity: 90%RH Consumed power: 5W Induction gas: gas (0.1% 0.5%) , natural gas (0.1% 0.5%), liquefied petroleum gas (0.1% 0.3%) Installation method: the wall shall be hung within 1m from the ceiling, the height shall not exceed 4m, and the gas shall not exceed 4m. It is best to install it within a radius of 1.5m AT-300 Natural Gas Sensitive Wireless Detector Alarm LPG Poisoning Warning Alarm Detector Independent Gas Detector Sensor Specifications: Model: AT-300 Power supply: AC 220V 50Hz Buzzer: 85dB Alarm concentration: 15%LEL Reset concentration: 8%LEL Operating temperature: -10~50 Relative humidity: 90%RH Consumed power: 5W Induction gas: gas (0.1% 0.5%) , natural gas (0.1% 0.5%), liquefied petroleum gas (0.1% 0.3%) Installation method: the wall shall be hung within 1m from the ceiling, the height shall not exceed 4m, and the gas shall not exceed 4m. It is best to install it within a radius of 1.5m Notes: 1. Due to the different monitor and light effect, the actual color of the item might be slightly different from the color showed on the pictures. Thank you 2. Please allow 1-3mm measuring deviation due to manual measurement.