The dryer is USB powered, with easy-to-replace filters and a 3mm shock-absorbing base. It uses a radial blower mechanism to remove moisture faster than traditional drying methods. This dryer uses 3D printer technology to make and design the housing and nozzle, making the machine compact, with greater wind power and easier to carry. The machine can be operated with a USB mobile power bank. This design makes it easy to use at home and more convenient to use when on a business trip. At the same time, we also provide a delicate storage bag, which is more concise and convenient for daily use and storage. Compatible with Respironics, Transcend, Resmed, Luna, Human Design Medical, Somnetics, CPAPS, BIPAPS, etc. Any standard 22mm flexible hose end can fit tightly, and a slender hose can also be used. Please note: This dryer only blows out ambient temperature air through the hose, and has no heating function. At the same time, do not place the machine in an environment above 50 degrees Celsius. The washable open-cell foam filter can be easily removed for cleaning or replacement by removing the filter cover on top of the dryer. The cover snaps on without tools and comes with a spare filter. Standard: Power comes from a standard USB "A" (flat rectangular) plug on a 1.0 m (3 ft) cord, with a power adapter and USB C to USB A adapter included to power the dryer via the USB C port. Timer: The control module on the 1.4 m power cord features speed selection (low/med/high) and preset timer (2/4/6 hours or long) without the need for an external adapter for ultimate portability. Additional options include USB timer and USB speed control module. The timer (2/4/6 hours or long) allows you to run the dryer for a set period of time to dry the hose daily from a humidifier or after washing. Turn on the fan when you need to dry the hose and get a dry hose after a while. The speed control module can choose low/medium/high gears. It is recommended to choose high gear for daily use, which has better effect. The two modules are concentrated on the power cord, without the need for external adapters or additional wires, which is very portable and suitable for home use and business trips.