610UA receiver:; USB/SD(TM) Card/MP3 playback; Compatible with audio out from smartphones & MP3 players; Aux input; 50W max x 4; Switchable US/European tuner; Bass, treble, balance & fader controls; Built-in EQ;CK65 2-way speakers:; Poly cone woofers & foam surrounds; 250W max/180W RMS per pair; Pair;