... choosable,excellent workmanship 4.MOQ:2000pcs Desk portable PC USB DC brushless cooler desk fan Features:1.2100RPM speed,145mm blade diameter ... , new DC brushless motor, super quiet.2.5V USB power supply, metal shell ... , special mesh enclosure design, safe.3.New generation of DC brushless technique, power just 2.25W, energy saving.4.Fan's ...