Single-gas, zero-maintenance detector operates up to two years maintenance-free: Just turn on the device and it runs continuously — no need for calibration, sensor replacement, battery replacement or battery charging. Compatible with both IntelliDoX and MicroDock II instrument management systems._x000D_Features:_x000D_• Compact, lightweight design with 1-button operation_x000D_• Designed for a range of harsh environments and extreme temperatures_x000D_• Automatically performs one internal diagnostic test every 24 hours_x000D_• Automatic logging of the 35 most recent gas events and bump test results_x000D_• H2S and CO 2-year models can be placed in hibernation when not being used for a week or more to extend life by that period of time, up to a year_x000D_• Wide-angle flash, which alerts simultaneously with audible and vibrating