Why is CDM-550H better than D40?
CDM-550H has no measurable advantages in this pair.
Why is D40 better than CDM-550H?
D40 has no measurable advantages in this pair.
Specifications
Side by side
| Radio & range | ||
| Radio standards | UHF, DMR | VHF, UHF, DMR |
| Licence | Amateur licence | Amateur licence |
| Digital mode (DMR / dPMR) | Yes | Yes |
| Dual band (VHF + UHF) | — | Yes |
| Frequency ranges | 400–480 MHz | 136–174 MHz, 400–470 MHz |
| Transmit power | 40 W | — |
| CTCSS / DCS sub-tones | Yes | — |
| Design & durability | ||
| Weight | 1,500 g | — |
| Width | 140 mm | — |
| Height | 175 mm | — |
| Depth | 46 mm | — |
| Protection rating | — | IP54 |
| Water protection (IPx) | — | IPx4 |
| Display | Colour display | — |
| Features | ||
| Channel scan | Yes | — |
| Emergency / SOS alarm | Yes | — |
| FM radio | Yes | — |
| Monitor button | Yes | — |
| Voice encryption / scrambler | Yes | — |
| PC programmable | Yes | — |
