Dimensions
Size comparison
DJ-P321BLRT-4D
| DJ-P321BL | RT-4D | Difference | |
|---|---|---|---|
| Height | 74.8 mm | 61 mm | +13.8 mm |
| Width | 46.8 mm | 112 mm | −65.2 mm |
| Depth | 27.7 mm | 38 mm | −10.3 mm |
| Weight | 90 g | 198 g | −108 g |
Drawn to the same scale from the official dimensions (front and side).
Why is DJ-P321BL better than RT-4D?
- Weight90 g vs 198 g2.2×
Why is RT-4D better than DJ-P321BL?
RT-4D has no measurable advantages in this pair.
Specifications
Side by side
| Radio & range | ||
| Radio standards | Japan specified low-power (422 MHz) | VHF, UHF, DMR |
| Licence | Licence-free | Amateur licence |
| Digital mode (DMR / dPMR) | — | Yes |
| Dual band (VHF + UHF) | — | Yes |
| Frequency ranges | — | 108–136 MHz, 136–520 MHz, 136–174 MHz, 400–470 MHz |
| Transmit power | — | 5 W |
| Channels | — | 1,024 |
| Maximum range (claimed) | 2 km | — |
| Squelch | — | adjustable |
| Power & battery | ||
| Battery capacity | — | 3,500 mAh |
| Battery voltage | — | 7.4 V |
| Power source | AA / AAA batteries, Rechargeable pack | Rechargeable pack |
| Runs on AA/AAA batteries too | Yes | — |
| USB-C charging | — | Yes |
| Battery level indicator | — | Yes |
| Design & durability | ||
| Weight | 90 g | 198 g |
| Width | 47 mm | 112 mm |
| Height | 75 mm | 61 mm |
| Depth | 28 mm | 38 mm |
| Protection rating | IP67 | — |
| Water protection (IPx) | IPx7 | IPx7 |
| Display | — | Monochrome display |
| Colours | — | Black |
| Features | ||
| VOX (hands-free) | Yes | — |
| Weather channels / alerts | — | Yes |
| FM radio | — | Yes |
| Key lock | — | Yes |
| Voice encryption / scrambler | Yes | Yes |
| PC programmable | — | Yes |
| Connectivity | ||
| Headset / earpiece jack | — | Yes |
| Connectors | — | USB-C, 3,5mm Klinke |
| Radios in the base pack | — | 1 |
