| General | |
| Manufacturer: | ONYX |
| Model: | BOOX i63SL Kepler |
| Measurements | |
| Dimensions (mm): (width x height x thickness) |
124.8 × 171 × 10.9 |
| Weight (g): | 238 |
| Display | |
| Display type: | E-Ink Pearl HD |
| Screen Size: | 6 |
| Screen Resolution (px): | 758 x 1024 |
| Grayscale: | 16 |
| Built-in lights: | Yes |
| Supported formats | |
| Text: | DJVU, DOC, EPUB, FB2, FB2.ZIP, HTML, MOBIPOCKET (Non-DRM), PDB, PDF, RTF, TXT |
| Graphic: | BMP, GIF, JPEG, PNG |
| Audio: | MP3, OGG, WAV |
| Other: | Adobe DRM |
| Processor | |
| Processor Type: | RockChip RK2906 |
| Clock Frequency (MHz): | 1000 |
| Memory | |
| Random access memory (RAM) (MB): | 512 |
| Read-only memory (ROM) (MB): | 4096 |
| Memory Cards: | microSD, microSDHC |
| Communications | |
| Multimedia | |
| Output of earphones: | 3.5 |
| Charging | |
| Capacity battery (MAh): | 1600 |
| Charging | |
| Charging from USB: | Yes |
| Charging from the mains: | Yes |
| Additionally | |
| Features: | Android 2.3.1 |