| Model | Description |
| 940L-DCP | Digital Control Panel for use with 930L series lightbars. |
| 940N-DCP | Digital Control Panel for use with 930N series lightbars. |
| 940-AMP | Siren Amplifier for use with the 930N and 930L series lightbars. |
| 940L-SIREN | Digital Control Panel and Siren Amplifier mounted together as a single unit. For use with the 930L and 930NL series lightbars. Includes the 940-M3473 Microphone. |
| 940N-SIREN | Digital Control Panel and Siren Amplifier mounted together as a single unit. For use with the 930N and 930NH series lightbars. Includes the 940-M3473 Microphone. |
| 940L-R-SIREN | Digital Control Panel and Siren Amplifier shipped as separate pieces with 20’ cables for remote mounting applications. For use with the 930L and 930NL series lightbars. Includes the 940-M3473 Microphone. |
| 940N-R-SIREN | Digital Control Panel and Siren Amplifier shipped as separate pieces with 20’ cables for remote mounting applications. For use with the 930N and 930NH series lightbars. Includes the 940-M3473 Microphone. |
| 940-M3473 | Hand held microphone for use with all 940 amplifier or siren systems. (This option is included when ordering either 940–AMP or 940–SIREN systems.) |