Accessory Power GOgroove SonaWAVE Rechargeable Portable Mini Speaker for Phones, MP3 Players, Tablets, Laptops & More - Supports SD Card and USB Stick MP3 Playback 3 speaker arrangement for powerful sound - 2 high-excursion drivers and passive amplified bass woofer Perfect to use with laptops, smartphones, tablets, mp3 players & other devices with a 3.5mm audio connection Multiple docking options supports mp3 playback from devices as well as SD/SDHC memory cards and USB flash drives Includes 3.5mm audio cable, USB cable, and AC adapter for power & charging; Rechargeable battery provides 2-3 hours of audio playback Comes with a 3 year manufacturer's warranty