An all-new oxygen sensor that operates consistently for five years — with no replacement costs for the life of the detector - plus a three-year warranty Guaranteed runtime for at least a 12-hour shift — down to -20°C — without compromising LEL detection of hydrogen, acetylene and other combustible gases IntelliFlash ™ light indicating detector has been bump tested and is monitoring correctly Durable, rechargeable lithium polymer battery — tested to last in extreme environments Ergonomic and wearable — doesn't weigh you down Real-time gas concentrations shown on LCD Bright, wide-angle visual alarm bars IP68 rating ensures maximum protection against dust and water User-friendly, tamper-proof operation with just one button and intuitive LCD icons Compatible with MicroDock II docking station for automated bump tests and calibration Bump testing (qualitative function check) of the sensors, is a recommended function and requires test gas cylinders and bump test accessories Colour Yellow