With easy on/off operation, this single gas detector offers extended longevity with a two year field-replaceable battery and sensor. Calibration is a simple automatic procedure and is compatible with BW Technologies by Honeywell's MicroDock II automatic test and calibration system. A wide range of user options, multi-language display and datalogging functionality make the GasAlert Extreme an ideal solution for many applications.     Additional GasAlert Extreme features: Tamper-proof settings with passcode protection  Continuous LCD shows real-time gas concentration  Compact and lightweight design makes it comfortable to wear  Water-resistant  Simple automatic calibration procedure; compatible with BW MicroDock II automatic test and calibration station