Description KEEP SAFE: Your gas detector comes CALIBRATED AT THE FACTORY. It has super high sensitivity, excellent repeatability, accurate measurement, and faster response time (30S). With these features, the gas detector can provide you with enhanced protection. This gas detector can work continuously for 10 hours, so it can keep you safe all the time in your workplace, such as in a confined space SUPER EASY TO USE, THREE ALARM METHODS: the detector of gas is READY TO USE. If you want to use it to detect gases, all you need to do is turn it on, it will start working once you turn it on. This portable four-in-one gas detector with voice has adjustable audio, visual and vibration alarms when preset levels are reached. You can accurately measure the gas concentration with an easy-to-read number displayed on the screen EASY CARRY AROUND WIDE APPLICATION - The gas detector comes with a super nice padded carrying case. It has a compact size and a unique clip design that makes it convenient for the user. This gas detector can be widely used in home, petroleum, metallurgy, agriculture, chemical industry, refining, fire prevention, effective prediction, etc., to ensure the safety of you. With this detector, your family, friends or compa HIGH QUALITY, LOWER ERROR: The gas detector is made of high-strength ABS and non-slip rubber. Waterproof, dustproof and explosion proof