The particular product here is DP 8000mAh inbuilt lithium battery which can rotate or oscillate that is move in right and left direction to cover large and wide of the room or office. And its foldable for easy carrying around From one place to other like from home to office or work place. Its a high quality rechargeable fan with light function for reading or to lighten the room or office or dark place with long duration.8000mAh inbuilt lithium battery capacityOscillating/ rotatableBattery voltage: 3.7VFan rate power:12WUsing time: 3.7/ 6 / 9 / 34 Hours (strong/ middle/ weak/ LED light)Charging input: 5V=2A3 gear speedsLED light functionMulti angle adjustable80⁰ automatic Rotation Durable and long lasting Quality and efficient BRIGHT LED LIGHTSMulti-Angle Adjustable 3 Gear SpeedsLed LightRechargeable Battery Life of 8000mAh80 degrees rotationBRIGHT LED LIGHTSMulti-Angle Adjustable 3 Gear SpeedsLed LightRechargeable Battery Life of 8000mAh80 degrees rotation