Features: Adjustable Brightness: Three brightness levels provide soft, even, and glare-free illumination for a comfortable drawing experience. Touch Control: The smart touch switch is highly sensitive; simply touch the light to turn it on and adjust the brightness. Standard Size: Ultra-thin 3.5mm design and standard A4 copyboard size, suitable for A4 paper, with precise scale markings for accurate reference. LED Lighting: Built-in LED light, enhanced by a high-transmittance light guide plate, ensures clear illumination for your work. USB Powered: 5V USB low-voltage power supply, compatible with mobile power supplies, chargers, laptops, and other devices. Specifications: Item Type: A4 Copyboard Product Size: Approx. 335 x 235 x 3.5 mm / 13.2 x 9.3 x 0.1 inches Weight: Approx. 513g / 18.1oz Charging Method: USB Control: Touch Light Source: White Light Levels: 3 brightness levels Luminous Flux: 300-350LM Power: 3.5W Color: Black Material: Acrylic + PC Applicable Paper Size: A4 Scale Range: Length: Approx. 0-29cm / 0-11.4in Width: Approx. 0-22cm / 0-8.7in Lifespan: 50000H Package List: 1 x Copyboard 1 x User Manual 1 x USB Cable