| General | |
| Manufacturer: | FR Book |
| Model: | E251 |
| Measurements | |
| Dimensions (mm): (width x height x thickness) |
108 x 152 x 11.6 |
| Weight (g): | 195 |
| Display | |
| Display type: | E-Ink Vizplex |
| Screen Size: | 5 |
| Screen Resolution (px): | 600 x 800 |
| Grayscale: | 8 |
| Built-in lights: | No |
| Supported formats | |
| Text: | DOC, EPUB, HTML, PDF, TXT |
| Graphic: | BMP, GIF, JPEG, PNG, TIFF |
| Audio: | MP3, WAV, WMA |
| Processor | |
| Processor Type: | Ingenic Jz4740 |
| Clock Frequency (MHz): | 336 |
| Memory | |
| Random access memory (RAM) (MB): | 64 |
| Read-only memory (ROM) (MB): | 512 |
| Memory Cards: | microSD |
| Communications | |
| Multimedia | |
| Speaker: | stereo |
| Output of earphones: | 3.5 |
| Charging | |
| Capacity battery (MAh): | 1500 |
| Running time (number of displayed pages) |
8000 |
| Charging | |
| Charging from the mains: | Yes |
| Additionally | |