Millennium M10's visual OPI will display a GREEN light during normal operation (when oxygen concentration levels are greater than 82%), a YELLOW light for concentrations between 70-82%, and a RED light for oxygen concentrations less than 70%. The audible OPI alarm will sound if oxygen concentration levels fall below 70%.
Durable & Safe Construction: Millennium M10 is designed to be largely maintenance free. The SMCT "sure cycle" valve was designed specifically for the Millennium; while protective tubing neatly guards the concentrators electronic wires helping protect against electric shock. Millennium M10 features durable construction with high grade caster wheels built to withstand rigorous usage.