Altec Lansing iMT620 inMotion Classic Portable Stereo Speaker - Black Music Pause - Automatically pauses when a cal is received on the iPhone Onboard controls - Power, audio source, volume, and FM radio and song navigation Clear, digital sound pushing full, pulsing bass - Digital signal processing technology delivers thumping bass Audio Alignment - Drivers, enclosure and electronics are balanced for optimum sound Interference Free - Unique design is immune to mobile phone interference, eliminating the need to switch to airplane mode