USB powered hose dryer with filter. New design with radial blower fan moves more air with less noise. After washing your hose ( or if there's humidity inside your hose and headgear after use ) simply plug this into one end of your hose and into a USB A socket and the nearly silent fan will gently push air through your hose to dry it out. Compatible with Resmed, Transcend, Respironics, Human Design Medical, Luna, Somnetics, CPAPS, BIPAPS, etc. Any machine that uses a standard 22mm flexible hose end will work. Compact for easy travel. Made from 3D printed parts with some additional hardware. The body and nozzle are PETG, which is the same plastic as in water bottles. The fan and filter case are ABS. All metal hardware is brass ( threaded inserts ) or stainless steel ( fan screws, filter case screws ). This new design uses a high quality 1w USB powered dual ball bearing radial blower fan that develops more pressure and moves more air than axial fans, particularly when pulling that air through a filter and pushing it through a hose. Compared to the previous version, this one has 225% more filter area for better airflow and less noise. This dryer is nearly silent. Please note: This dryer only blows ambient temperature air through your hose, it does not have a heater. The washable open cell foam filter is easily removed for cleaning or exchange by popping off the filter cover. No tools are required and a spare filter is included. Power comes from a standard USB "A" ( flat, rectangular ) plug on a 1M ( about 3 feet ) cord. Add-on options include a USB timer and a USB power adapter. The timer allows you run the dryer for a set amount of time to dry your hose daily from moisture from your humidifier or after washing. Turn the fan on for your chosen time and come back to a dry hose. Timers are sourced from China and due to limitations on availability the exact features ( speed controls, what time intervals are used ) may vary somewhat.