USB Rechargeable 4000mAh 3 Gears Adjustable Portable Summer Air Cooling Hanging Neck Fan Bladeless Outdoor Sports Travel Personal Wearable Neckband Fans Feature: It is lightweight and has a long cooling time. Long battery life, not easy to consume power. Made of silicone with adjustable stretch, the U-shaped ring neck fits comfortably around your neck, keeping your hands free and calm. The compact bladeless neck fan is easy to carry and store, with a hanging design. Can be used for outdoor sports, indoor workouts, office, gym, even if you are running, traveling and camping. Specification: Name: Portable hanging neck fan Color: white, green Battery capacity: 4000mAh Weight: Net weight 250g, Gross weight 400g Product size: length 192mm/7.56in, width 175mm/6.89in, height 60mm/2.36in Material: ABS+Silicone Wind speed: adjustable in three gears, first gear breeze, second gear natural wind, third gear strong wind Input current: DC 0.5A /1A Output voltage: DC5V-9V Input voltage: DC5V Battery voltage: 3.7V Working current: 0.3A-0.1A Power consumption: 5W Charging time: 3h Power supply mode: battery storage (1 X lithium battery), USB power supply (pluggable computer USB port), power bank power supply (not included) Note: Due to the different monitor and light effect, the actual color of the item might be slightly different from the color showed on the pictures. Thank you! Please allow 1-2cm measuring deviation due to manual measure