Portable USB Mini Fan
4 inch USB small iron metal mini fan.
-Ultra-quiet design, with buttons, switches, systemic anti-rust paint.
-360 rotation of the upper and lower air, four aluminum blades, full of strong wind.
-Thin, light and small size, easy to carry, easy to move, more robust, more long-term use.
-USB interface can be directly used as a power plug, can cater to computer cooling fans, safety shock-proof design.
-Quiet design, effectively avoid resonance.