R-111 M Head 2 Pin Adjustable Volume Earphone Microphone 1. Specially designed G-shaped earpiece, suitable for long-time wearing 2. The volume of the button can be adjusted and used with the most suitable radio sound 3. The iron clip that is not easy to rust is not easy to be damaged in rain 4. PU thread is easy to stretch, not easy to break 5. Line: 3.2 / 4C / 1M / PU 6. Housing: ABS 7. Speaker size: 15mm 8. Speaker impedance: 32Ohm+/-15% 9. Rated input power: 1W 10. Sensitivity: 116+/-3 dB / 1kHz 11. Distortion rate: less than 5% 12. Frequency response: 200HZ-20KHZ 13. Weight: 34g 14. Suitable for Motorola GP2000, GP2100, GP300, GP 308, GP68, GP88, GP88S, CT150, CT250, CT450, CT450LS, P040, P080, P100, P110, P1225, 1225LS, 2000, XTN446, XTN500, XTN600, MV11, MV11CV, MV12, MV12CV, MV21C, MV21CV, MV22, MV22CV, MU11, SV10, SV11, SV11D, SV21, SV12, SV22; suitable for HYT TC-500, TC-600, TC-700, TC-610, TC-620 , TC-2110, TC-1600, TC-510, etc.