Specification: Size:19*15 cm/7.48*5.9 Inches. Opening Height of Clamp:1.57 Inches. Item Weight:320g/0.705lbs. Charging time:2-4 Hours. Working time:2-8 Hours. Features: – Clip-on Style,Small and Portable for Convenient Use. – USB or rechargeable battery operated. – Upgraded 2200mAh rechargeable lithium battery, lasts for 2- 8 hours. – 3 wind speeds for all your needs. – 360 degrees vertical and horizontal rotation for all-around cooling. – Perfect for Baby Stroller or Crib, Office, Home and Outdoor Activities. Operation Instruction: 1. USB Cable connect to USB Port of PC, laptop, portable charger. 2. Turn on the Twist Switch to plus on the Top of mini fan. 3. Turn off the Twist Switch to minus on the Top of mini fan. Package Includes: 1 x USB Fan. 1 x USB Charging Cable. 1 x 18650 Battery. 1 x User Manual. Tips: 1.When you use it to charge other devices(use power bank function), please don’t turn on the fan, or it will stop to charge. 2.If you need to replace battery, please make sure the replacement battery is standard 18650 Lithium ion battery.