Independent gas leak detector sensor. Features: This product can be used as an independent household alarm equipment or as a front detector of the alarm system. Easy installation and maintenance, automatic reset after alarm. High reliability sensor. Intelligent detection of various combustible gases. Specification: Plug: , EU plug (220~240V) working voltage: dc9-16V or AC 220V static current: 90mA 30mA (low power consumption type) alarm current: 100mA 40mA (low power consumption type) warm-up time: About 120s Alarm level: 10% LEL Alarm Indicator: Flashing red LED sound level: 85dB/m Operating Temperature: - 10~50 ambient humidity: 95% RH (non-condensing) Installation method: Wall-mounted alarm output: relay output / sound and flash radio distance: 100m in open area Equipment: PVC Total Dimension: 120mmx70mmx43mm/4.72''x2 76''x1. 69'' (approx) color: white quantity: 1 serial note: Transition: 1cm=10mm=0.39inch retail package. Due to manual measurement, please allow 1-3mm error. Make sure you don't mind before you bid. Due to the differences between different monitors, the picture may not reflect the actual color of the item. The Thank You Package includes: 1 x gas detector 1 x mounting screw 1 x user manua.