Check the listing for details. New EGD01 Combustible Gas Detector Methane Solid State easy to use USA. Condition: New. Listed at 42.77 USD. AideTek Egd01 Combustible Gas Detetor LED sound alarm Hold the meter with one hand. Do not adjust the knob now. Move the sensor slowly close to the detected gas. When the meter detects a certain concentration of flammable gas, the red light will flash and the alarm will sound. The greater the concentration is, the more intense the alarm will be. After the completion of detection, rotate the knob clockwise to the lowest sensibility position. Press the power supply key to power off, and the green light will turn off. Specifications: Operating temperature: 0~50ºC Operating humidity: 10 ~90% (above freezing) L×W×H: 172×70×46 mm Length 0f sense:380mm Power supply mode: 4x1.5V AAA battery ( not included) Weight: 273g (without batteries) Standard individual packing: English manual Packaged weight:523g Type of gases detected: Natural gas, methane (sewage gas), ethane, propane, butane, acetone, alcohol, ammonia, hydrogen, gasoline steam, sulfide, organic solvent steam, smoke, paint thinner, naphtha, volatile industrial solvents. Functions description: Quickly recognize and determine the flammable gas leakage location Manual sensibility adjustment High sensibility Visible sound and light alarm Important Notice: Please use the product in pure air after preheating. Please replace battery immediately when green light flashes. Please power off when not using to prevent battery discharge. Main Parameters: Resolution: 50 ppm (methane) Alarm range: 10%—40% LEL Response time: < 2S (40% LEL) Accessories: 1)english user mannul， 2)carring bag Shipping: US order will ship from USA, all other orders will ship from China via Registered air mail 9-16 business days， most countries’ customers can track package on-line on their post office website, thank you