Clarity Power technology and up to 50 dB of amplification at 124 dBSPL Compatible with TVs, Stereos, MP3 players and public IR systems such as those used in museums, movie theaters and houses of worship "Home" setting provides high fidelity stereo sound for use with the supplied transmitter "Away" setting allows you to receive 95kHz transmissions from public IR broadcast systems used in places such as museums, movie theaters and houses of worship Telephone call notificaiton: Connect your telephone line to the C120 base and receive notification through the headset when your phone is ringing Adjustable volume, tone and balance Lightweight wireless headset with automatic shutoff Two (2) rechargeable NiMH batteries (8 hours total listening time; 4 hours per battery) Includes external TV microphone, AC adapter, two (2) audio cords and headset carrying pouch