Gas leakage independent detector sensor. Features: This product can be used as an independent home 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) preheating time: About 120s alarm level: 10% LEL alarm indicator: Red LED flashing sound level: 85dB \/ m working temperature: - 10 ~ 50 ambient humidity: 95% RH (no condensation) Installation method: wall mounted alarm output: relay output \/ sound \u0026 flash alarm radio distance: 100m in open area material: PVC overall dimension: 120mmx70mmx43mm \/ 4.72 '' x2 76''x1. 69 '' (approx.) color: white quantity: 1 set note: Transition: 1cm = 10mm = 0.39inch retail packaging. Due to manual measurement, please allow an error of 1-3mm. Please make sure you don't mind before bidding. Due to the differences between different monitors, the picture may not reflect the actual color of the item. Thank you package includes: 1 x gas detector 1 x mounting screw 1 x user manual LYT team is your forever loyal partner