The Millennium II (M21) single channel universal transmitters have been engineered from the ground-up to include the innovative features that managers and operators in the field demand, while providing rock solid day-to-day operation, even in the most extreme conditions. The Millennium II redefines what you expect from a fixed gas detection solution. Special Features Current loop test jacks for each channel on faceplate Non-intrusive one man calibration (magnetic switch) Field selectable toxic gas ranges Redundant menu access via push buttons Sensor enable/disable option from menu (Cl1, Div2) Alarm relays configurable/assignable to any channel Displayed event logging (980 events) Easily retrieve last calibration data from sensor Four languages - English, French, Spanish, Portuguese