| Operating frequency range, Hz | 200 – 6000 |
| The module of the electrical impedance of the telephone at a frequency of 1000 Hz, Ohm | 600 ± 120 (при последовательном соединении), .....150 ± 30 (при параллельном соединении) |
| The response of the phone at a frequency of 1000 Hz, not less than, Pa | 8 |
| Weight, no more | 80 г |
