1Professional Design A3 / A4 Two types of specifications are optional, the board comes with scale, suitable for all types of paint. On the back there are 4 foam pads that are more stable when used. 2Touch Sensitive Press and hold the switch to adjust the brightness of the light (3 levels). The screen can effectively filter the blue light, protect the eyes. 3Easy to Use With USB it can be used directly with computers, mobile chargers and plugs. The drawing board is ultrathin and superlight 5 mm, very easy to carry. 4Enhanced Version Using LED light strips and smart chips, the light source is stable. The highly transparent acrylic sheet can improve brightness effectively, drawing more clearly. 5Widely Used It is suitable for professional animation, comics production, art teaching, interior design, architectural, costumes, and also for X-ray visualization in hospitals, etc.A3 LED Copy Panel Power consumption: 11W Lamp beads: 90 beads and 0.12W / 1 beads Power voltage: DC 5V Electric current: 2A Interface: Micro - USB Type of lighting: Light guide board Scale: yes Work area: 29 * 41 cm Product size: 47 * 34.5 * 0.5 cm Weight: 896 g Certification: CE / FCC / ROHS / ISO 9001 Package includes: 1 x A3 LED Copy Panel 1 x USB cable 1 x EU Plug 1 x Instruction Manual A4 LED Copy Panel Power consumption: 4W Lamp beads: 36 beads and 0.12W / 1 beads Power voltage: DC 5V Electric current: 1A Interface: Micro - USB Type of lighting: Light guide board Scale: yes Working area: 20 * 30 cm Product size: 36 * 24 * 0.5cm Weight: 372 g Certification: CE / FCC / ROHS / ISO 9001 Package includes: 1 x A4 LED Copy Panel 1 x USB cable 1 x EU Plug 1 x Instruction Manual Note: Please note that the product is plugged in and used without batteries.