C9003 2 Pin Speaker Microphone 1. Both left and right ears can be worn comfortably. 2. A remote microphone with a push-to-talk button, you can edit anywhere. 3. The transparent tube connected to the earplugs makes you look like a special agent or bodyguard, and protects your health from radio ectromagnetic wave radiation. 4. The earpiece/speaker fits easily in your ears to keep your conversation private. 5. Cable length (plug and play): 135cm 6. Two-pin standard diameter: 3.5mm stereo ear (thimble). Microphone 2.5 mm stereo (bottom pin) 7. The distance between two needles: 11mm 8. Weight: 35 grams 9. Suitable for RETEVIS H-777, R888s Plus, RT-5R, RT-B6, RT-5RV, RT1, RT2, RT22, RT5, RT3, RT8, RT80, suitable for Kenwood KPG KPG27D, KPG29D, KPG48D, KPG49, KPG55D, suitable for BAOFENG UV5R, UV8, UV8D, UVB5, UVB6, A52, UV5RA, UV5RC, suitable for HYT TC286,386,2685,3865,6685,278,378,388,2100,2088, suitable for PUXING PX-777,PX-888 , PX-888K, PX-325, PX-358, etc.