Perfect for use with turntables, computers, smartphones, TVs and other devices, the AT-SP3X powered bookshelf speakers deliver rich, full-range audio via a wired or wireless connection. These compact, unobtrusive speakers elevate the listening experience in any room. They feature 3" woofers and 1.1" tweeters specially tuned by a built-in DSP to produce powerful, well-balanced sound for music, movies, and more. Powered by the included AC adapter (which comes with three adapters for international use) and joined by a long 6.6' (2.0 m) speaker cable, the speakers are easy to set and use in any space requiring no external receiver or amplifier. Devices connect directly to the speakers dual RCA jacks or wirelessly via Bluetooth technology. A power button with LED indicator and volume control dial keep operation simple.