Graphics Tablets descriptions We use high-quality raw materials, all materials are very suitable for the product, please rest assured to buy. Led Light Drawing Tablet. Feature: Power Supply by USB Cable Super Bright&Eco-friendly LED Ensure Extreme Low Calorific Value and Life Span Up to 50000 Hours Flicker-Free&No Radiation ,good for Your Eyes Especially Long-hour Working. Thin&Portable Design.Ultra-thin and Light Weights Which Makes the Portable A4-F and A4-F-USB Can Be Not Adjust Brightness,A4-F-can Be Adjust Brightness. Specification Frame Size: about 33.5 * 23.3cm Working Area: about 31.1 * 23.3cm Thickness: about 0.35cm Material: Acrylic Light Source: LED Adjustable Light:L1-L2-L3 Voltage: 5V Power: 2.2W Packing Included: 1*LED Drawing Board, 1*Usb Cable(Not Included No Dimming Style ) . Products number : SOMONO89385