The RAE Systems MultiRAE Pro 6-Gas Monitor is a portable detector for up to 6 gases, including oxygen, combustibles, carbon monoxide, hydrogen sulfide, sulfur dioxide, and VOCs. It has a rugged, water-resistant design with large buttons and a bright display. The lithium-ion battery lasts over 18 hours. It features audible, vibrating, and visual alarms for hazards. The device can datalog up to 6 months, downloadable via USB. Regular bump testing and calibration with gas cylinders are recommended for accuracy.