Sennheiser Set 830 TV Amplifier Receiver Only Infrared technology lets you enjoy audio from your TV or home stereo system from up to 39' away Lightweight stethoset design has comfortable in-ear earpieces to provide high-quality audio while reducing the impact of environmental noise Large pendant-style volume dial makes it easy to make volume adjustments Rechargeable BA 300 battery provides up to 12 hours of continuous operation and recharges in only 3 hours when docked with a transmitter