Material: ABS, PP & Silica Gel Size: 21.9 (l) x 21.7 (w) x 3.5 (d) Additional Info: Place fan around your neck and adjust to desired angle. Press On/Off Button for 3 different fan speeds. Press Light Button once to turn on alternating light colours or twice to turn on 1 colour only. USB charged, 1200mAh Battery & 5V Voltage