| Mastr Professional Mobile | |||||||
| Product Code 31 | |||||||
| Mechanical Package | Operating Voltage | RF Power Output Range | Channel Spacing | Mounting | Number of Freq. Tx/Rx | Options | Frequency Range |
| M | T | 5 | 4 | T | A | S | 11 |
| Mastr Mobile Unit | 12 VDC Unit | 16-38 Watts | 20 KHz | Trunk Mount Mobile | 1/1 | Standard | 25-33 MHz |
| S | A | 6 | 5 | F | B | U | 22 |
| Mastr Mobile Telephone Service | 6/12 VDC with 6V Cables | 38-64 Watts | 25 KHz | Front Mount Mobile | 2/1 | Channel Guard | 33-42 MHz |
| E | 7 | 6 | S | C | W | 33 | |
| 6/12 VDC Unit with 12V Cables | 64-128 Watts | 30 KHz | Simplex Manual w/search | 2/2 | Noise Blanker and CG | 42-50 MHz | |
| U | 7 | P | D | P | 44 | ||
| 28/12 VDC Unit with 28V Cables | 40 KHz | Simplex Manual w/reverting | 1/2 | UHS Receiver | 66-77 MHz | ||
| J | 8 | E | G | 45 | |||
| 28/12 VDC Unit with 12V Cables | 50 KHz | 3/3 | UHS Receiver and CG | 77-88 MHz | |||
| 9 | Y | N | 55 | ||||
| 60 KHz | 4/4 | Noise Blamker | 132-150-.8 MHz | ||||
| 66 | |||||||
| 150.8-174 MHz | |||||||
| 77 | |||||||
| 406-420 MHz | |||||||
| 88 | |||||||
| 450-470 MHz | |||||||
| 89 | |||||||
| 470-494 MHz | |||||||
| 91 | |||||||
| 494-512 MHz | |||||||