RT-B77 HELB Specifications
| Dimensions | widht x height x depth: 75 mm x 103 mm x 27 mm | |
| Weight | 230 g | |
| Operating temperature | -20 °C ... +60 °C | |
| Ingress protection | Water resistant up to 5 bar / 50 m | |
| Operating frequency | 121.500 MHz (VHF), 243.000 MHz (UHF) optionally available | |
| Training frequency | Preselectable (in 25 kHz increments between 120.000 and 125.000 MHz) | |
| Output power | 2 W* | |
| Modulation | A3X and ASK |
|
| Battery type | 2 x 9 V block LiMnO2 | |
| Battery life | 6 h to 48 h* | |
| Interfaces | IRDA and RS232 | |
| Antenna | 260 mm monopole antenna 90° monopole life-jacket antenna |
|
| * As a function of microprocessor controlled power management |
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