2000 mAh long lasting battery, battery life is approximately 10 to 20 hours.2 speed levels: low and high. Press on button once for low speed and twice for high speed.LED indicator lights. Red light will flash when your device is low battery, flashing white light indicates fan is charging, and lights will turn off once fan is fully charged.Micro USB charging cable is included inside the box (AC adapter sold separately). Charging time: approximately 3 to 4 hours.Multi-purpose Mini fan for hot summer days, outdoor activities, or in office/library. Minimal noise making; Small portable slim power bank with built-in flashlight for camping, power outages, or for on the go activities.