Dimensions
Size comparison
UBZ-M51SERT668
| UBZ-M51SE | RT668 | Difference | |
|---|---|---|---|
| Height | 79.9 mm | 50 mm | +29.9 mm |
| Width | 47 mm | 116 mm | −69 mm |
| Depth | 22 mm | 35 mm | −13 mm |
| Weight | 110 g | 161 g | −51 g |
Drawn to the same scale from the official dimensions (front and side).
Why is UBZ-M51SE better than RT668?
- Weight110 g vs 161 g+46%
Why is RT668 better than UBZ-M51SE?
RT668 has no measurable advantages in this pair.
Specifications
Side by side
| Radio & range | ||
| Radio standards | Japan specified low-power (422 MHz) | PMR446 |
| Licence | Licence-free | Licence-free |
| Digital mode (DMR / dPMR) | — | No |
| Frequency ranges | — | 446 MHz |
| Transmit power | — | 0.5 W |
| Channels | — | 16 |
| Maximum range (claimed) | 2 km | — |
| CTCSS / DCS sub-tones | — | Yes |
| Squelch | — | adjustable |
| Power & battery | ||
| Battery capacity | — | 1,200 mAh |
| Battery voltage | — | 3.7 V |
| Power source | AA / AAA batteries, Rechargeable pack | Rechargeable pack |
| Runs on AA/AAA batteries too | Yes | — |
| USB-C charging | — | No |
| Battery level indicator | — | Yes |
| Design & durability | ||
| Weight | 110 g | 161 g |
| Width | 47 mm | 116 mm |
| Height | 80 mm | 50 mm |
| Depth | 22 mm | 35 mm |
| Protection rating | IP67 | — |
| Water protection (IPx) | IPx7 | — |
| Shockproof | — | Yes |
| Display | — | No display |
| Features | ||
| VOX (hands-free) | Yes | Yes |
| Channel scan | — | Yes |
| Monitor button | — | Yes |
| Voice encryption / scrambler | — | Yes |
| PC programmable | — | Yes |
| Connectivity | ||
| Headset / earpiece jack | — | Yes |
| Connectors | — | 2,5 und 3,5 mm |
