4 in 1 gas detector, with audio, visual, and vibration three alarm methods to alert when preset levels are reached. Compact size with back stainless steel clip design, comes with high-grade engineering plastic storage box to provide all-around protection. Features: Handheld 4 in 1 gas detector with high quality gas sensor, excellent sensitivity and repeatability. With audio, visual, and vibration three alarm methods to alert when preset levels are reached. IP65 protection level. High-strength engineering housing to prevent splash, dust and explosion. Comes with high-grade PPT engineering plastic storage box, anti-drop and shockproof to provide all-around protection. Color backlit LCD display with clear font to show the gas concentration of H2S, O2, CO and EX. Compact size with back stainless steel clip design, convenient for user to carry around. Specifications: Material: ABS Color: Black / Orange (Optional) Detect Gas Type: EX: 0-100%LEL H2S: 0-100PPM CO: 0-1000PPM O2: 0-30%VOL Resolution: EX: 0.1%LEL H2S: 0.1PPM CO: 0.1PPM O2: 0.1%VOL Response Time: 30 Seconds Display Error: 5%FS Protection Level: IP65 Working Temperature: -20~50 Operating Humidity: 90%RH (without Condensation) Working Pressure: -30kPa~200kPa Built-in Battery: 3.7V 1800mAh Lithium Battery Item Size: 7.0 * 5.0 * 14.3cm / 2.76 * 1.97 * 5.63in Item Weight: 239g / 8.41oz Package Size: 20.5 * 17.5 * 8cm / 8.07 * 6.89 * 3.15in Package Weight: 755g / 1.66lb Package List: 1 * 4 in 1 Gas Detector 1 * Calibration Cover 1 * Charging Cable 1 * Charger 1 * Manual 1 * Box