SM18N2 Highlights: 1. Compliance with IP67 standard. 2. With Φ3.5mm external earpiece jack. 3. With 360°swivel metal clip. 4. With Emergency key.
Rated Impedance: 16Ω±15% （@ 1.5kHz 1V）;
Sound Pressure Level: 91±4dB (1w/30cm)（@ 300Hz-3KHz AVE）;
Rated Power: 1.5W Max. Power: 2.5W;
Sensitivity: -42±2dB @ 1KHz（0dB＝1v/Pa）;
Weight: about 160g;
Operating Temperature: -30℃~65℃
Application: for users who work under harsh environments, such as traffic wardens, police officers, fire fighters and rescuers.
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