Durable PTT button allows push for hands-free calling; sensitively captures clear and loud sound for transmission* From plug to PTT 140 cm* The throat microphone can be easily hidden under the collar.* Using high-quality transparent sound tube, people around you are almost imperceptible.* This is very suitable for use in high environments, such as driving, riding motorcycles and bicycles.Note: Before buying, please make sure it fits your walkie-talkie.Compatible with the following radio models:XPR series:XPR6300, XPR6350, XPR6380, XPR6500, XPR6550, XPR6580XiR series:XiR P8200, XiR P8208, XiR P8260, XiR P8268DP series:DP3400, DP3401, DP3600, DP3601DGP4150, DGP4150+, DGP6150, DGP6150+APX series:APX4000 APX6000 APX6000XE APX6500 APX7000 APX7000XE