K plug. Two-pin standard diameter : Ear 3.5mm stereo (top pin). Mic 2.5mm stereo (bottom pin). And the acoustic coil audio tube pin diameter: 3.5mm, which can fit most of smart phones.
Advanced Covert Acoustic Tube Earpiece Earphone Headset PTT microphone for Baofeng Uv-5r 666s 777s 888s Kenwood Wouxun Puxing Radio. And the separated acoustic coil audio tube(3.5mm plug) can plug into your smart phone, clearly sound, enjoy music without bother of radiation.
Earplug can be rotated left and right ears, wear comfortably and won''t hurt your ear during long time wearing
Walkie talkie earpiece headset with good performance for both listening and talking, prevent distortion of sound.
Related sites : nightclubs, bars, paintball, security, restaurants, hotels, airports, casinos, manufacturing plants, conventions, concerts, warehouses, and noisy environments.

Technical Details

Product Details

Package Dimensions
Width : 3.11 inch
Height : 1.1 inch
Length : 7.72 inch

Shipping Weight: 2.08 ounce (View shipping rates and policies)

ASIN : B0721Y144R