As a piezo siren the PSW.90028 works from 6 to 28V DC at a frequency of 2,8kHz. Alternatively a steady tone, a short or long pulse tone can be produced. A small power input, a high volume as well as the classification into the protection class IP 65 make an employment possible to both, in the internal and in the external area.

Advantages:
| High life span
| Small current consumption
| No sparking
| High reliability
| No high frequency disturbance
| Penetrating, harmonic content sound
| Simple and fast assembly