1、[High Precise Sensor] The detector utilizes an imported gas sensitive semiconductor sensor, ensuring high precise and more accurate measurements. 2、[High Performance] Our gas test meter features rapid response time, low power consumption, excellent stability, and a long lifespan, giving you a reliable testing tool. 3、[Multiple Alarm] The gas tester provides real time feedback on gas leakage. When gas concentration exceeds the alarm level, the instrument will emit an audible and visual alarm. 4、[Portable and Versatile] Powered by 3 AAA batteries (not included), this portable halogen meter can be carried anywhere and used both outdoors and indoors. 5、[Wide Application] This halogen gas tester is suitable for various domestic and industrial applications, ensuring your safety in different occasion by efficiently detecting gas leakages. Item Type: Halogen Gas Tester Material: ABS Battery: 3 x AAA Batteries (Not Included) Detection Range: 0-5000PPM, 0-200ppm (±20ppm), 200-2000ppm (±10%), 2000-5000ppm (±20%) Sensitivity: 1PPM Preheating Time: 5s Alarm Mode: Visual, Audible 1 x Halogen Gas Tester 1 x Storage Bag 1 x User Manual