Reasonable offers will be considered Rechargeable, with NFC, Bluetooth connection or can use Aux cable input with 3 different sound modes. Great for hooking up to computer, tv or standalone to play music from a Bluetooth device. Also has a mini SD card slot. Works great but don't need a second sound bar. 4400mA built-in battery, approximately 6 hours playing time on one charge. This is a portable sound bar Dimension: 11.4 *2.32*1.92 inches Weight: 450g Bluetooth version: 4.1