4. LED display screen: Multi functionality makes use more intimate and suitable for indoor and outdoor use 2. Infinite variable speed adjustment: can be freely to meet your requirements. 1. High quality components: This mini fan features ultra high quality high-speed bearings, a new CNC metal turbine, brushless motor, and manual winding motor 3. Portable and compact: Small in size, , easy to carry, and suitable for outdoor use. 5. Uses: Air cushion blowing and suction, computer equipment cleaning, industrial dust blowing, charcoal combustion assistance, car snow blowing, film studio and air conditioning, pet drying, etc.