... 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 ...