This Behind-The-Head style headset provides tough, reliable, 2-way radio communication and can be used in applications including auto racing, industrial / heavy equipment operation, recreational off-roading and much more! Designed for use with a two-way radio or intercom, this headset can keep you communicating even in high noise environments. Features a DNC microphone for clear transmissions and Clear Hear speakers for unsurpassed audio performance. Rugged headsets are built to perform in extreme noise environments - combining the latest technology with firm, yet comfortable fit for optimum communication. The 5-pin port on this headset allows you to use virtually any handheld radio on the market using a radio specific jumper cable (these are sold separately as there are many different connector types depending on the radio being used). These headsets are designed to be used with a separate communications device (2-Way radio, intercom, etc.). If you are looking for headsets that can be connected directly together, such as race fan headsets, use the amazon search bar to find 'H80 Double Talk' (ASIN: B00LLNJ2HC).