Features 1、Two modes of 3 speeds cold compress and hot compress are available, with six gears adjustments in total to meet your different needs 2、Aviation aluminum grade thermal conductive sheet, with smart chip can effectively control the temperature 3、Quiet operation, avoid the noise caused by the traditional hanging neck fan, and will not be disturbed when learning to work, etc. 4、The silicone part of the halter is made of elastic plastic + silicone material, soft and adjustable angle, comfortable to wear 5、Cool RGB color lights, beautiful and built in colorful gradient lights, improve the style of life, easy to carry and portable 6、Built in 2600mAh high performance polymer lithium battery, no need to connect, easy to carry, wide application range Specifications Item Type: Neck Fan Weight: Approx. 479g / 16.9oz Product Size: Approx. 170 x 40 x 147mm / 6.69 x 1.57 x 5.79in Working Voltage: DC5V Battery: built in a 333693 lithium battery with a capacity of 2600mAh (battery included) Charging Time: about 2.5 hours Life Time: about 2 hours Working Mode: three speeds hot compress / cold compress Package List 1 x Neck Fan(battery included) 1 x USB Cable 1 x Manual