Kanto YU5 5.25" 2-Way Powered Bookshelf Speakers with aptX Bluetooth 4.0 - Matte Black (YU5MB) 2x Optical (TOSLINK) Audio, Bluetooth 4.0 with Qualcomm aptX, 3.5mm mini-jack AUX, RCA L/R Inputs 40 Watts Per Channel Class D Amplifier, 5.25 inch Kevlar drivers, 1 inch Silk Dome tweeters Subwoofer Output, USB charge port 5V 1.0A Remote Control included, Each speaker measures 6.9" W x 8.4" D x 10.7" H (17.5 W x 21.5 D x 27.2 H cm)