Portable Design: This fan is shaped like a watch, which can be worn directly on the hand. Portable and compact, it is perfect to use for walking, traveling, camping, picnic, hiking and other outdoor activities 3 adjustable speeds: This USB fan has 3 adjustable speeds, including the low, medium and high speed level, you can choose the breeze you need, just press the power button to change the wind setting. Locking design, press up to work standing Battery operated:Built-in rechargeable battery, you can enjoy cool outdoors without electricity. Compatible with any USB port like computer, power bank, wall outlet, car charger Cute USB Fan: Fits the wrist design, comfortable to wear. Cute shape and mini size, suitable for kids, boys and girls as a cool gift in summer Specification Product name: Mini USB fan Charging method: USB charging Battery voltage: 3.7V 800mAh Material: ABS + PP Input voltage: 5V DC Output Power: 5W