Features: 100% and high quality The portable 4 gas detector with high quality imported gas sensor, excellent sensitivity and excellent repeatability, Comes FACTORY CALIBRATED. Open and use directly. This multi-gas monitor detector 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. Three alarm modes (sound, light, vibration, display) is not easy to ignore, high security, high and low alarm value can be set free.Alarm digital time stamp and logging. High density big digital LCD screen display real time gas concentation value; compact size and unique clip design, it is convenient for user to carry around, Chinese and English operation interface. This 4 in 1 gas detector is used to accurately locate the leaking gas of various combustible gases, O2, CO, H2S, LEL. Package Includes: 1x Gas Detector ( battery included) Specifications: Material: ABS Size: 135x70x35mm/ 5.31x2.75x1.37 in note: Please allow 1-3cm 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. About : All items will be within 3 business after the payment is received. Most times you will receive them within 8-12 then. The specific time is depend on circumstances.Any questions, please feel free to contact us During the shopping process, if you have any questions, please feel free to consult us, we will reply you within 24 hours, wish you a happy shopping Thanks for your cooperation and we'll make you feel satisfied.