Tenq 2 PIN Earpiece Headset with Mic for Two-way Radio Baofeng Uv-5r 666s 777s 888s (4Pack) Package of 4 Provides excellent durability, reliability and performance in low-profile environment. Clip this hands free earpiece onto your shirt and begin using your radio device to communicate discretely and easily, whether you're in security, retail, or hospitality. Ideal for demanding covert security applications where sound clarity and earpiece durability are of paramount importance. Almost All with a two pin plug, former pin diameter of 3.5 mm and 2.5 mm in diameter after pin, double pin from 8 mm within, 11 mm center distance of 2 pin