4000mAh USB Rechargeable Lazy Portable Summer Air Cooling Hanging Neck Fan for Students Outdoor Sports Travel Office Leafless Personal Wearable FansSpecification:Product Name: hanging neck fanProduct Size: 218x140x4 7mm/8.58x5.51x1.85inProduct Weight: 285gWorking Voltage: DC 5V/1A Working Speed: 0.85A (Max)Power: 5W Motor: Brushless Motor*4Battery Capacity: 4000mAhCharging Time: 3-4HCusage Time: 3-16H (Depends on factors Environmental)Charger interface: type-c360 deg; Surround BlowerNote: Due to the different monitor and light effect, the actual color of the item may be slightly different from the color showed on the pictures. Please allow 1-2cm measurement deviation due to manual measurement.1 * Fan1 * Data Cable