| Legend |  |
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| Model | ML-10 | ML-15 | ML-20 | ML-25 | ML-30 |
| Power | 10W | 15W | 20W | 10W | 30W |
| Play Sound | 1 | - | 1 | 1 2 3 4 5 6 7 8 | 1 2 3 4 5 6 7 8 |
| Voltage | DC12V/24V | DC12V/24V | DC12V/24V/ AC220V | DC12V/24V | DC12V/24V |
| Impedance | 4Ω | 4Ω | 4Ω | 4Ω | 4Ω |
| Sound Pressure | 90～100dB | 100～110dB | 110～120dB | 90～100dB | 90～100dB |
| Alarm Sound Function | Monosyllabic | Six sound loop | Monosyllabic | Octave | Octave |
Hotline