An easy-to-use solution for your home entertainment needs, the Klipsch KD-400 2-Way Active Wireless Bookshelf Speakers require no additional components to function. Simply plug them into an available wall outlet and plug in your audio source. The built-in amplifier offers an RCA input, optical digital input, and supports wireless streaming from Bluetooth-compatible mobile devices. You can use them with your TV, turntable, smartphone, tablet, and more. They're compact for easy placement, yet offer big sound, with 48W of total power. The 4" woofer and 1" Dhorm tweeter in each bass reflex MDF cabinet are made to output dynamic and accurate sound with low distortion. You can even add an optional subwoofer to further enhance your experience.