| External power supply | 18 to 56 VDC |
| Power consumption | 3.3 W at 48 V without keypads |
| Microphone | |
| Nominal acoustic input level | 75 to 90 dB SPL |
| S/N | > 60 dB at 85 dB SPL |
| Frequency response | 340 Hz to 14 kHz (-3 dB) |
| Loudspeaker | |
| S/N | 80 dB at max. |
| Sound pressure level | 85 dB (SPL) at 0.5 m and 1 kHz |
| Headset | |
| Connector | 3.5 mm jack |
| Recommended type | Hosiden HBH 0058 |
| Control inputs | 2 x |
| Operation | Closing contact (with supervision) |
BOSCH |
