Features: Portable detector for detecting all combustible gas. Long flexible stainless probe reaches all areas. Audible semiconductor probe and auto fast warm-up. Instant response, pinpoint leak position and low battery indication. Audio & visible leakage alarm indication and adjustable sensitivity.Compact size, light weight, easy to carry and operate. Specifications: Detection Gas: Combustible Gas Sensitivity: Variable, Minimum 50 PPM (methane) Alarm Mode: sound alarm and light alarm Response Time: Instantaneous Warm-Up Time: Less than 20 Seconds Battery Type: 3 x AA 1.5V Alkaline Batteries (NOT Included) Duty Cycle: 3 Years Continuous Operation Time: 9 hours(slightly vary with working condition) Probe Length: 35.5cm / 13.98in Operating Temperature: 0~50, Relative Humidity 0~80% Storage Temperature: 10~60, Relative Humidity: 0~70% Material: plastic colour: red black Package Contents: 1 x Gas Detector Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.