Headphone Expansion ONLY.  Does not come with transmitters.

Features:
• 12-hour rechargeable battery life (fully charged)
• Exclusive BASSpak/Subpac adapter for each individual Silent Sound Headset
• U.S.-Based Customer Service
• Volume control
• Fold-able design for easy shipping
• Up to 3 channels of audio w/ LED lights (Green, Red, Blue)
• Professional sound quality (Less than 1% distortion)
• Over the ear style, cutting down on most outside noise
• Works up to over 1,500 feet from the base
• FREE headphone numbering and Headphone Management Binder included with purchase
• Auto-Mute, if no signal is received by the headphone, the headphone will mute automatically. Saving battery power.
• Super simple setup! Plug & Play
• Shipped in sturdy plastic totes with zip ties that can be padlocked after receiving for extra security when storing
• Customer Service and tips to help with your system
• Glossy Decals of your own logo on each individual Silent Sound Headset 

What comes in the pack:

• Chosen amount of headphones (complimentary numbered with high-quality decals on inside of headphone band)
• Charger(s) with power supply (each charges up to 16 headphones at a time)
• Headphone Management I.D. Binder numbered to help with rentals
• Locking Storage Tote