Rugged Radios Rear Seat Expansion Kit The Rugged Radios Rear Seat Expansion Kit transforms a two-person intercom system into a device capable of connecting up to four riders. It's built to work with both STX Stereo and Mono Intercoms. The kit includes 16-foot cables designed to easily extend communication to rear seat passengers, enhancing the group riding experience by ensuring everyone stays connected. Features: Ultimate Mono and STX Headset Features: Carbon Fiber style finish Flex boom mic M101 red dynamic noise cancelling mic Hard wired cabling Large comfortable gel ear seals Cloth ear covers Easy to use volume control Includes: (2) Headsets or Helmet Kits (2) 16' intercom Cables