Depending on the type, the sound is produced electro-mechanically or by an electro-magnetic pressure chamber.
Ship class III
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| Type: | ZETFON 300/310|| ZETFON 300/310 + Commando-facility |
ZETFON 400/310 AC || ZETFON 400/310 DC |
| Sound intensity: | 130 dB | 130 dB |
| Frequency: | 310 Hz | 310 Hz |
| Range: | 1 SM | 1 SM |
Ship class IV
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| Type: | ZETFON 50/650 | ZETFON 120/330 |
| Sound intensity: | 120 dB | 120 dB |
| Frequency: | 650 Hz | 330 Hz |
| Range: | 0,5 SM | 0,5 SM |