1.Ultra-quiet,5V/12W for laptop 2.Safety metal line grill 3.4 inch ... ~3000rpm Mini Metal USB Fan, mini fan, USB fan, laptop fan, portable fan, cooler fan, desk fanUltra-Low Power ... Move UP & DOWN. 4 inch metal mini portable laptop USB fan Feature:*Ultra-quiet design.*360°up and down ... Low power consumption, the Portable USB Fan also suitable for outdoor using. 4 inch metal mini portable laptop USB fan