Detects H2S, CO, O2 and combustible gases (LEL). Save time never having to charge or service your portable multi-gas detector! Reliably test for H2S, CO, O2 and combustible gases (LEL) with this simple-to-use and simple-to-maintain detector. Just turn it on and have worry free assurance of protection against toxic gases 24/7 for two full years. Gas Clip Technologies’ continued development and refinement of advanced low-power photometric infrared technology for LEL measurement helps make gas detection simpler than ever. No charging ever. No calibrating needed. No Maintenance. Features: • 2 year runtime - 2 year life! • No charging ever! No calibration needed! • Durable • Ergonomic • Simple One Button Operation • Works in oxygen enriched and oxygen deficient environments • LEL sensor is immune to H2S & silicone poison • Full datalogging at 1 second intervals • Assembled in USA • Compatible with MGC Simple Dock or MGC Simple Wall Mount Dock