Dimensions
Size comparison
S1 Pro LFTK-3501T
| S1 Pro LF | TK-3501T | Difference | |
|---|---|---|---|
| Height | 53 mm | 117 mm | −64 mm |
| Width | 108 mm | 54 mm | +54 mm |
| Depth | 20 mm | 26 mm | −6 mm |
| Weight | 145 g | 210 g | −65 g |
Drawn to the same scale from the official dimensions (front and side).
Why is S1 Pro LF better than TK-3501T?
- Weight145 g vs 210 g+45%
- DisplayBacklit display vs No display
Why is TK-3501T better than S1 Pro LF?
TK-3501T has no measurable advantages in this pair.
Specifications
Side by side
| Radio & range | ||
| Radio standards | PMR446 | PMR446 |
| Licence | Licence-free | Licence-free |
| Digital mode (DMR / dPMR) | No | No |
| Frequency ranges | 446 MHz | 446 MHz |
| Transmit power | 0.5 W | 0.5 W |
| Channels | 16 | 16 |
| Maximum range (claimed) | — | 9 km |
| CTCSS / DCS sub-tones | — | Yes |
| Squelch | — | adjustable |
| Call tones | — | 10 |
| Power & battery | ||
| Battery capacity | 2,200 mAh | — |
| Battery voltage | 3.8 V | 7.5 V |
| Power source | Rechargeable pack | Rechargeable pack |
| USB-C charging | No | No |
| Battery level indicator | Yes | Yes |
| Design & durability | ||
| Weight | 145 g | 210 g |
| Width | 108 mm | 54 mm |
| Height | 53 mm | 117 mm |
| Depth | 20 mm | 26 mm |
| Protection rating | — | IP54 |
| Water protection (IPx) | — | IPx4 |
| Military standard (MIL-STD-810) | — | Yes |
| Display | Backlit display | No display |
| Colours | — | Black |
| Features | ||
| VOX (hands-free) | — | Yes |
| VOX sensitivity levels | — | 10 |
| Channel scan | — | Yes |
| Key lock | Yes | Yes |
| Roger beep | — | Yes |
| Monitor button | — | Yes |
| PC programmable | Yes | Yes |
| Connectivity | ||
| Headset / earpiece jack | Yes | Yes |
| Connectors | 3,5mm Klinke | 2,5 und 3,5 mm |
| Bluetooth | Yes | — |
| Radios in the base pack | — | 1 |
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