| Nominal voltage | DC 12V |
| Working temperature | -20℃~70℃ |
| Working humidity | 10％~95％ |
| Intercom mode | half duplex |
| Input impedance | 2.2KΩ |
| Application | It is suitable for bus, school bus, taxi and other vehicle monitoring scenarios |
| Sensitivity | -36±3DB，1K Hz |
| FREQ | 100~20000Hz |
| Built-in Microphone | yes |
| Built-in Speaker | yes |
| Output interface definition | 1-LINE OUT；2-LINE IN；3-DC12V；4-GND |
| Output interface type | 4Pin aviation head (female head) |