PCI Race Radios Single Side Crew Chief Headset The Single Side Crew Chief Headset from PCI Race Radios works with your handheld radio. Known for their top-notch quality, PCI Race Radios ensures comfort and adjustability. This headset promises clearer, louder sound, with a push-to-talk button conveniently located on its side. Features: 3.5mm female audio input jack on ear cup Adjustable mechanical microphone boom Noise canceling microphone Adapter Cables sold separately