- Drive’s multi-threaded lid ensures a secure fit every-time, preventing leaks and service calls - Compatible with oxygen flow up to 15 LPM - Audible back pressure alarm activates at 6 psi - No aluminum fitting in stem: it eliminates shredded aluminum diffuser so often found in lower quality models - Soft plastic diffuser reduces clogging due to mineral build-up - Translucent jar provides improved visibility of jar contents - Humidifier bottle lid is colored green/yellow, making it easy to tell patients on the phone how to change the bottle - Bottle has a 500 ml water capacity - Bottle fill line is very easy to see - There are finger grips at the top of the bottle, making the lid easier to screw on/off for the patient