Overview: USB charging: Built-in 900mAh rechargeable safe lithium battery, no need to carry additional batteries, just use the USB data cable in the package to charge it. Portable: This astronaut small fan can be hand-held or hung around your neck, freeing your hands to do other things. Low noise: Noise reduction with upgraded brushless motor, fast wind speed, allowing you to enjoy quiet and coolness while working and sleeping. EASY TO USE: It can last 1.5-4h when fully charged, this small personal fan is compatible with most computers, laptops, portable chargers and other devices with USB output. Wide Applicability: Perfect for Beach, Pool, Camping, Hiking, Travel, Picnic, Park, Concert or Sports Event. Product information: Power supply: USB Product features: mute; noise; below 36dB Wind speed gear: 3 gears Color: Moonlight White, Deep Black Built-in battery capacity: 800mAh-1000mAh Number of fan blades: 7 Shell process: spraying (UV paint, rubber paint, metallic paint, piano paint, pearl powder) Product certification: CE, FCC, ROHS Size: 66*68*96.5mm Battery life: 3-6 hours Packing list: Fan*1 Packing box*1 Power cord*1 Manual*1