Remote speaker microphone almost all compatible with with Baofeng UV-5R BF-F8HP ; Kenwood and Retevis H-777 RT22 RT-5R and more Shoulder mic with Kenwood standard 2 pin plug allows universal compatible use for business and outdoor activities;free your hands Push to talk button and handheld remote speaker mic are located on the accessory for quick and easy use Durable PU coil cord allows you extremely get long term usage experience Sensitive microphones and speakers allow you to communicate clearly even in a noisy environment