This SD Card Speaker makes no pretentious claims, just slot your USB drive or SD card into one of the slots, press play and sound will emerge. No kidding. Apparently it uses Nokia rechargeable phone batteries, which is a first, and can be powered by the mains, a USB cable or the built in battery pack.
Compact and portable design, wooden box with acrylic face 2. Support SD/MMC card and USB flash drive 3. Support Remote control 4. Li-ion Rechargeable battery, all Nokia batteries are available 5. Support long time playing about 4 hours with 1200MAH poly lithium battery 6. FM optional 7.Powered by: USB cable or Built-in battary or DC 5V 8. Speaker size: 160*175*145MM