Come and see our amazing products. Hand Free Design - Special designed hand-free small fan allows you to do things you love while staying cool. 1200mAh lithium battery fan built-in rechargeable was powered by USB. No extra batteries are required. The small personal fan is compatible with most computers, laptops, portable chargers and other devices with USB output. 4-10hours working time depends on different speed. ABS silicone, safe. Allows you to wear the hand fans around the neck. Or as a desk fan put it on the table . Pls confirm with us about the packing info, stock color and exact production time before placing your order.