Wide Application Easy Carrying Around: This multi gas monitor comes with a wonderful silver case with compact size and clip design. Easy to use with a clipping right on your cloth and keep your safe the entire time while working in confined space, effectively predicting as to ensure the safety of the environment. High Sensitive and Accurate Measurement: The portable 4 gas monitor comes with imported gas sensor, excellent sensitivity and excellent repeatability. Three Alarm Methods: The portable gas detector is ready to use, FACTORY CALIBRATED, comes with adjustable audio, visual, and vibration alarms alert when preset levels are reached. Accurately measure the gas concentration with easy-to-read. Waterproof,dust-proof, explosion-proof and lower error: Detection error better than less than equal 5 percent F.S. and response time: T Less than 30s. Zero and span calibration options. Enough capacity 1800 mAh battery for long continuous working time. size:135x32x70mm Material:Plastic colour:Orange or Black Package Contents: 1 x Detector 1 x English manual 1 x USB cable Only the above package content, other products are not included. Note: Light shooting 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.