BLUETOOTH WIRELESS - Popular classic bookshelf speakers now can be enjoyed without the hassle of wires. Simply connection to an iPhone, Android, Tablet, PC or Mac. STUDIO SOUND QUALITY - Naturally fine tuned sound reproduction from 4 inch bass and 13mm silk dome tweeter. OPTICAL AND COAXIAL INPUTS - Digital inputs to enable lossless connection to most TV and computers. REMOTE CONTROL - Adjust the volume and toggle inputs at your fingertips. Bass and treble control located on the side of main speaker. 2 YEAR WARRANTY - Quality components in solid MDF wood housing are built to last. 24 month parts and labor warranty in USA and Canada.