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Do not base your order on the picture presented.
The Airial MQ4100 Oxygen Conserver is the most accurate single lumen conserver available with a conserving ratio of 5.6:1.
This pneumatic conserving device features "Whisper Quiet" technology making it the perfect solution for home or away.
Our patented brass-core engineering makes it safe and reliable for years of dependable service.
Conserving Regulator is a combined regulator and conserving device.
Switch between Continuous and Conserve mode by turning the knob.
Selectable outlet flow: 2-4 LPM continuous; 1-5 conserving setting.
UL Approved 1.25 inch Gauge with Rubber Gauge Protector.
Click-Style flow control with 10 flow settings.
Compact Size: 4.8"L x 1.8"W x 1.5"H.
Weight: 12.9 oz.
3 Year Warranty.