BW Technologies Yellow Gas AlertQuattro 4 Gas Monitor with Alkaline Battery is compatible with BW? MicroDock II automatic test, calibration system. Detector for combustible gas, oxygen, hydrogen sulfide and carbon monoxide gases has simple one-button operation and audible, visual and vibrating alarm with extended alarm bars. It has flexible power options and intelliFlash? offers continuous visual confirmation of detector operation and compliance. Field-proven sure cell sensor provides an unprecedented performance, even in the harshest environments and easy to identify icons for onsite auditing, compliance. It has extensive data logging, event logging capability and heartbeat pulses are continuous during normal operation. Full function self-test is initiated upon activation and runs continuously during operation and flip display is accessible through IR interface for tamper-proof operation. Easy-to-read, multi-language LCD displays all four gas concentrations and supports English, French, German, Spanish and Portuguese languages. DUE TO THE SHELF LIFE OF GAS SENSORS, MOST MULTI GAS MONITORS ARE MADE TO ORDER BY THE MANUFACTURER. PLEASE ALLOW EXTRA TIME FOR DELIVERY OF THIS PRODUCT.