Specifications of SM24N2-Ex
| Weight | about 230 g |
| Color | blue & black |
| PTT Key | available |
| Emergency Key | none |
| Connector | 16-pin connector |
| Microphone Sensitivity | -50±4dB@1kHz 3.0V 2.2K,0dB=1V/Pa |
| Speaker Power | 1 W (rated); 2 W (max.) |
| Speaker Impedance | 20Ω±15% @ 1 kHz |
| Speaker Frequency Response | 94±3dB@1kHz 1w/30cm |
| IP Rating | IP57 |
| Anti-explosion levels | ib IIC Ex level |
| Operating Temperature | –20℃ to 55℃ |
| Storage Temperature | –20℃ to 65℃ |