The Grace Digital CastDock is a Black speaker developed exclusively to play and power Chromecast Audio. No messy extra power and audio cables cluttering up the counter, just Dock it and Rock it! The CastDock provides you a custom Chromecast Audio speaker and dock, perfect for every room of your house. The CastDock is not just another pretty face it rocks the house with a digital class D 50 watt amplifier and electronic crossover. We've even integrated a digital fiber optical connection to support Chromecast Audio's high resolution setting, which allows for 24- bit, 192-khz lossless sound, better than CD audio. Chromecast Audio Compatible, customer drive & subwoofer, 50 WATT digital amplifier, Wave MaxxAudio DSP plu electronic crossover , 60hz-20Khz , Aux-in , 1/4" mount