Huion LB4 LED Light Tracing Pad Art Craft Light Box 1. Huion LED light box comes with many super bright LED lamps in it which can see through very thick paper. 2. Huion use special acrylic surface, which makes it feel like a glass panel but much stronger than glass. 3. Simple operation The Light Pad doesnt need to install any software, you just need to insert the plug we enclosed, turn it on then you can start your creative work. 4. Specification: Dimension: 400 x 270 x 8mm Working Area: 320 x 228mm Working Surface: acrylic Backlight: LED Voltage: USB 5V Rated Power: 1W Light Guide Way: Light Guide Plate Eveness: 88% Brightness: 576cdsquare meter Luminous Flux: 112LM Backlight Life: more than 50000hrs Color Temperature: 8000-10000K weight: 1.0kg Battery Capacity: 1050mAh Battery Life: about 3.5h 5. Packing list: Tracing Pad x 1 USB cable x 1 adapter x 1 paper clip x 1 pad pucks x 1 Instruction manual x 1