| General | |
| Manufacturer: | Fujitsu-Siemens |
| Model: | Loox 420 |
| Year: | 2004 |
| Operating system: | Windows Mobile 2003 PE |
| Capacity battery (MAh): | 1100 |
| Measurements | |
| Dimensions (mm): (width x height x thickness) |
70.6 x 113.2 x 14.1 |
| Weight (g): | 125 |
| Processor | |
| Processor Type: | Intel XScale PXA255 |
| Clock Frequency (MHz): | 400 |
| Memory | |
| Random access memory (RAM) (MB): | 64 |
| Read-only memory (ROM) (MB): | 32 |
| Communications | |
| Bluetooth: | 1.1 |
| Wi-Fi: | 802.11b |
| Other: | IrDA |
| Multimedia | |
| Screen Size: | 3.5 |
| Screen Resolution (px): | 240 x 320 |
| Speaker: | mono |
| Output of earphones: | 3.5 |
| Management and input | |
| Touchscreen: | resistive |
| Buttons: | navigation buttons, physical buttons |
| Extension | |
| Memory Cards: | MMC, SD |
| Additionally |