Expand your two-person intercom system to 4 persons with these expansion packs. Available in headset and helmet kit options for STX Stereo and Mono Intercoms with 16' cables to reach the back seats. (see compatibility info below)

AlphaBass Headset Features:
• TRUE Carbon fiber in AlphaBass models    
• Leather ear seals
• Flex Boom Mic
• M101 Red dynamic noise cancelling mic
• Easy to use volume and bass control

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

Mono and STX Helmet Kit Features:
• Alpha Audio speakers
• Superior highs and lows for quality sound
• Clear Hear speakers
• Dynamic Noise Canceling mic
• Easy to install Helmet speakers with peal and stick adhesive

Includes:
• (2) Headsets or Helmet Kits
• (2) 16' intercom Cables

Compatibility:
STX: Works with STX STEREO High Fidelity Intercom, Rugged STX STEREO cables, and other stereo intercoms like PCI Trax.
MONO: Works with Rugged Radios MONO intercoms such at the RRP 364, 696, 696PLUS, 5050, 6100.