plustek A4 both side scanning scanner

mage Sensor CIS x 2 (Duplex Scanner)
Light Source LED
Optical Resolution 600 dpi
Hardware Resolution 600 x 600 dpi
Scan Modes Color: 48-bit input, 24-bit output
Grayscale: 16-bit input, 8-bit output
B/W: 1-bit
ADF Capacity 1. 100 sheets (A4/ Letter, 70 g/㎡ or 18 Lbs)
2. 30 sheets (Business Cards, landscape feeding)
3. Plastic Card, Max. thickness under 1.2 mm landscape feeding
4. Passport: Less 4.0 mm (0.15 in.) thickness (including carrier sheet)