Digital Foci Pocket Album OLED - Portable Digital 2.8 Viewer, Charcoal #P20110 Type: OLED Color: Red, Blue Power Supply: AC100-240V to DC 5V/1A USB Port: USB 1.1 Effective Viewing Area: Viewing area 2.8 diagonal (2.3 x 1.7) Brightness: 200 nits Contrast Ratio: 10000 : 1 Viewing Angle: Viewing angle 170 degrees horizontal & vertical