Monitor hydrogen sulfide (H2S), combustible gases (EX), oxygen (O2), and carbon monoxide (CO) with this all-in-one Gas Detector Meter. This rugged Gas Detector features a rechargeable battery and an LCD screen with backlight, delivering precise readings and instant alerts for ultimate protection. Key Features: Comprehensive Gas Detection: Measures H2S (0–1000 PPM), EX (0–500 PPM), O2 (0–100% LEL), and CO (0–30% VOL) with high accuracy. Fast Response: Alerts in under 30 seconds for timely safety warnings. Durable & Portable: Compact design (133 x 67 x 30mm), lightweight (205g), and built to operate between 14°F–131°F. Rechargeable Battery: 1800mAh lithium battery with USB charging for sustainable, long-lasting use. User-Friendly Interface: Clear LCD display with adjustable backlight shows real-time gas levels, low battery, and over-limit warnings. Customizable Alerts: Tailor notifications and settings to your environment for personalized safety. Specifications: DIY Supplies: Electrical Gas Types: Multifunctional (H2S, EX, O2, CO) Display: LCD with adjustable backlight Battery: Rechargeable 1800mAh lithium, USB charging Size: 133 x 67 x 30 mm Weight: 205g Operating Temperature: 14°F to 131°F Harmful Chemicals: None Package Includes: 1 × GOYOJO 4-in-1 Gas Leak Detector