WD-1A Air Horn comply with COLREG Rules, and easy use.
Technical Specification:
| Voltage | Power | Size | Pressure | Distance | Sound Pressure Level | Frequency | Working Mode | Air consumption | Electric heater voltage | Electric heater power |
| （AC/DC） | (W) | DN | PN | Nautical mile | (dB) | （Hz） | （m3/s） | （DC/AC） | （W） | |
| 220 | 45 | 25 | 1 | 1.5 | ＞138 | 160 | Internal | ＜8.3×10-3 | 220 | ＜250 |
| 110 | 110 | |||||||||
| 24 |