Connect 2 Bluetooth devices at the same time Speaker wire only for connecting the speakers together Built-in amplifier eliminates need for amplifier/receiver Premium audio quality with built-in amplifier, 13mm silk dome tweeters and a 4 inch full range bass unit. Classic wooden cabinet finish, housed in 100% medium-density 15mm thick fiberboard (MDF) Dual integrated line-in jacks for connection to other analog audio devices Dome Tweeters for smooth, articulate highs Ceramic Paper-Cone Drivers deliver powerful bass Appealing rounded edges offer you the softened feel