At 77,000 RPM the YF4's motor spins far beyond the range of conventional desk fans, which typically operate below 3,000 RPM. The resulting 17.5m/s airflow velocity is what separates it from a standard cooling fan — at that speed, airflow penetrates keyboard switch housings, CPU heatsink fins, laptop vents, and car dashboard gaps to dislodge packed dust rather than simply moving surface debris around. The 13-blade aerodynamic design maintains a smooth, focused stream at the nozzle rather than turbulent scatter, making the high velocity practically usable for precision cleaning without disturbing nearby items.

Most fans offer 3 speed presets. The YF4 offers 199 individually addressable speed levels between 3.2W and 46W output — a resolution that matters when the use case changes from blowing dust off a display panel (where too much force can damage the screen) to clearing a heatsink caked with accumulated debris (where high force is necessary). This range also makes the YF4 genuinely usable as a personal cooling fan at lower settings, where noise and airflow can be tuned precisely rather than accepting whatever the nearest preset delivers.

The built-in LED display shows current speed level (out of 199), remaining battery percentage, and active charging status at a glance. Knowing the exact battery level before a cleaning session removes the uncertainty of guessing whether the device has enough charge to complete the task — particularly relevant given that runtime at maximum speed is 38 minutes, so starting a long cleaning session on a near-empty battery without knowing it is a realistic failure mode that the display prevents.

The 4000mAh / 7.4V lithium-ion battery powers 10 continuous hours at minimum speed — practical for all-day desk use as a personal fan without mid-day charging interruptions. At maximum speed (46W output) runtime is 38 minutes — enough for a thorough electronics cleaning session. The 7.4V nominal voltage is notably higher than the 3.7V cells used in most handheld fans, enabling the high-torque motor performance without the battery discharging rapidly at mid-range speeds. USB-C charging at 5V/2A refills the battery in approximately 3.5 hours.

Three interchangeable nozzle attachments adapt the YF4's airflow to different cleaning and cooling scenarios. A narrower nozzle concentrates output for precision tasks such as clearing between keycaps or cleaning camera sensor compartments; a wider attachment disperses airflow for surface cleaning over larger areas; and an angled attachment reaches into car vents, monitor bezels, and enclosed equipment racks. The nozzle system makes the single device cover what would otherwise require multiple tools — a compressed air canister for electronics, a fan for personal cooling, and a dedicated vent-cleaning tool for enclosed spaces.