Description:  The combustible gas alarm is an alarm that detects gas leakage by sensing natural gas. When the concentration of natural gas reaches the alarm value, the alarm will emit a sound and light alarm signal to remind you to take measures to effectively protect the safety of life and property for you and family. It can control other smart hardware products through the linkage of the gateway device, such as flexible control of window openers, exhaust fans, smart curtains and other devices.    Specification:   Wireless Technology: Zb;  Power input: DC 5V 1A;  Power Supply: Micro USB DC5V/type-c;  Working temperature: -10℃~ +55℃;  Alarm LEL: 8% LEL (natural gas);  Concentration Error: ±3%LEL;  Alarm Method: Audible and visual alarm, and wireless connection alarm;  Alarm Sound Pressure:≥70 dB (1m in front of the gas detector);  Installation Method: Wall-mounting or ceiling-mounting;  Dimensions: 85 x 29mm;    Package included:   1 x Independent combustible gas detector;  1 x Mounting plate;  1 x User manual;  1 x 3M sticker;  1 x Power connection;  2 x Expansion tubes;  1 x Adapter DC5V;  2 x Screws