brand new and high quality Features: Made of high quality plastic, it is solid, durable and good performance, long service life It adopts advanced catalytic sensor, quickly response, fast alarm, low consumption and energy saving. When the concentration of flammable gas reaches 2%, yellow LED lights up; when the gas reaches 10%, red LED lights up. It can be used to test natural gas, methane, propane, biogas, LPG and some other flammable gases. Easy to install, effectively protects your safety. Pen shape, compact size, easy to carry Great for home and industry use. Gas Leak Detector only, other accessories demo in the picture is not included Specification: Powered by: 2 x AA batteries(Not included) Material: Plastic, Catalytic Sensor Size: app.22 x 2cm/8.66 x 0.79in Color: White Quantity: 1 Pc Product Parameters: Test Gases: natural gas, natural gas, methane, LPG and other combustible gases Warm-up Time: Less than 60 seconds Alarm frequency: 2.713KHz/30ms; 2.713KHz/100ms Alarm mode: 2%LEL (LED Yellow) 10%LEL (LED Red) Response time: Less than 20s Alarm method: Sound, light Working Temperature: 10-40/50-104 Environment humidity: Less than 90%RH Note: No retail package. Please allow 0-1cm error due to manual measurement. pls make sure you do not mind before you bid. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you Package Includes: 1 x Combustible Gas Leak Detector