Newly updated quick release earbud in-ear design: The speaker listening part can be removed from the headset. The speaker is with standard 3.5mm jack, you can use this part as a listen only earpiece for your remote speaker mic or cellphone or MP3 or other audio devices. | 2.5mm 3.5mm 2pin two-pronged ports K1 Connector walkie talkie speaker mic Compatible with Baofeng Kenwood Retevis Arcshel radio models as follows H-777 RT21 RT22 RT-5R RT17 RT18 RT19 RT7 RT81 Rt27V UV-5R BF-F8HP BF-888S AR-5 AR-152 UV82 UV-S9PLUS UV-82HP TK3360 bf-f9v2 etc. | Built-in-line ptt and mic and clip: Condenser sensitive microphone which can produce high quality sound even in loud environments. | Adopt electret speaker: You can hear crystal clear sound in noise environment. Not muffled no crackling. | Package include: 1pcs headset + 1pcs speaker listener