How to Use: Touch switch, single touch to adjust brightness, long press to adjust color Specification: Item Type: LED Desk Lamp Material: ABS Inbuilt Battery: 2 x 18650 Lithium Batteries 4000mAh (Battery Included) Light Source: White Light, Warm Light, Natural Light Mode Function: Rechargeable, Three Level Brightness, Three Colors Light Source Charging Method: USB Appearance Color: Blue Number of Beads: 31 Power: 5W Luminous Flux: 370LM Product Size: Approx. 29 x 35 x 15 x 2cm / 11.42 x 13.78 x 5.91 x 0.79in ( Manual Measurement, Slight Error May Exist ) Weight: Approx. 403g / 14.22oz Package List: 1 x LED Desk Lamp (Battery Included)1 x USB Cable 1 x User Manual