1. Compliance with IP67 standard.
2. With Φ3.5mm external earpiece jack.
3. With 360°swivel metal clip.
4. With Emergency key.
1. Rated Impedance: 16Ω±15% （@ 1.5kHz 1V.);
2. Sound Pressure Level: 91±4dB (1w/30cm)（@ 300Hz-3KHz AVE);
3. Rated Power: 1.5W Max. Power: 2.5W;
1. Sensitivity: -42±2dB @ 1KHz（0dB＝1v/Pa）;
2. Direction: omni-directional;
3. Weight: about 160g;
4. Operating Temperature: -30℃~65℃
5. Application: for users who work under harsh environments, such as traffic wardens, police officers, fire fighters and rescuers.