This product is a high stability detector, used to detect the leakage of combustible gas, prevent the hazards caused by gas leakage. Features: 1. Protect Your Safety: This gas detector will have voice warning once it smells the gas leak, fast alarm and you can do something that avoids to happen explosion and fire, It's enough to protect the safety of family and property. 2. Easy to Install: Our gas alarm adapts excellent industrial design. Just plug in, and ready for monitoring potential gas leak risky after warm up process. 3. Sound & Light Warning: The gas detector quickly and accurately detects gas leak to give you the earliest possible warning of gas leak with voice alarm and flashing LED indicator. 4. High-stability Sensor: The detector uses a high-stability catalytic combustion sensor. It has the characteristics of high stability. 5. LED Digital Display: This product uses a LED digital tube to display the alarm concentration. It is used in places where combustible gas leakage may occur. Note: 1. This product should not be violently hit or knocked during transportation and installation, otherwise it will cause the probe to work abnormally. 2. It is a combustible gas detector and can not be used to detect toxic gases such as carbon monoxide. 3. This product must have a correct connection and a correct power supply. If it cannot be supplied normally the detector will not work. 4. This product must be maintained regularly in accordance with the requirements of the manual. 5. Use a vacuum cleaner to remove the dust on the surface of the detector once a month. 6. Do not wipe the detector with detergent or solvent. Chemicals can permanently damage the sensor or temporarily contaminate the sensor. 7. Avoid spraying air freshener, hair spray, paint or other aerosols near the detector. 8. Due to manual measurement, the size may be slightly different. Thank you for your understanding. 9. Due to different light conditions and different monitors, item color displayed in photos may be showing slightly different from real object. Specifications: Color: White Shell Material: ABS Plug Type: US Plug / EU Plug ( Optional ) Software Version: V1.2 Detect Gas: Combustible Gas Working Voltage: AC 100-250V Temperature Range: -10~+50 Humidity Range: 10%~95%(RH) Measuring Concentration Range: 0~100%LEL Display Concentration: 3%LEL Alarm Concentration: 7%LEL Alarm Reset: Automatically reset when combustible gas is cleared LED Display: Display gas concentration Indicator Information: AC Power: Green LED Gas Alarm: Red LED is always on Sensor Failure: Yellow LED is always on Alarm Mode: Sound and light alarm Item Size: 10.6*6.7*3.5cm / 4.17*2.64*1.38in Packing Size: 11.1*7*6.5cm / 4.37*2.76*2.56in Net Weight: 88g / 3.1oz Gross Weight: 112g / 4.0oz Package List: 1 * Smoke Alarm 1 * Instructions ( English )