Product DescriptionCharacteristics:1. The 28 outlet of the fifth gear wind is like an aviation turbine to gather air to compress and cool down, and then release it. The wind power is ten times that of ordinary neck hanging fan.2. Low pressure turbine cold air system. The low pressure turbine system is similar to the refrigeration principle of air conditioning.3.180 rotation around the cold wind at any time to control the wind direction, surround the whole body air supply, direct to every corner, let you every pore send out cool;4. It can be folded for storage, and it is very portable to put pockets and bags. Wherever you go, there is wind.5. Ultra-long endurance new energy battery built-in lithium battery 4000mah, gear selection (1-5) can work for about 3-7 hours.6.LED digital display at any time to grasp the use time, stall display and remaining power display;Parameters:Product Name: Bladeless turbine hanging neck wind type folding digital displayColor: White/blue/greenExpansion size: 5.5x20.5x24.6CMFolding size: about 27x9CMFunction gears: folding, digital display, fifth gearShake the head: Shake the head up and downPackage size: 12x9.2x29.5CMProduct material: ABSCharging time: about 2-3 hoursAvailable time: About 3-7 hoursBattery configuration: Lithium battery 4000mahNet weight: about 300GOperating voltage: 3.7VWorking power: about 1-3WPacking list:1xHanging neck fan1xUSB charging cable1x instruction