Sheepdog 2 Wire Push-to-Talk (PTT) with 3.5mm earpiece jack is built with lightweight braided fiber cloth cords, a premium noise-cancelling microphone and durable polycarbonate housing. Designed to withstand harsh environments. The full-size PTT is easy to find and operate. The braided cloth cord lays flat to the uniform or skin and is designed to be tangle-free. The PTT/mic cord can be mounted to the front of a vest/carrier or run down the sleeve. Ideal for police, fire, EMT, elite security, executive protection and military. Compatible with Harris XG-100 XG-100P XL-185 XL-185P XL-185Pi XL-200 XL-200P XL-200Pi XL Extreme 400P XL-400P radios.