Can play directly via Micro SD card (WMA/MP3/WAV)Built-in 600 mah rechargeable lithium-ion batteryTrue Wireless Stereo CapableApproximately 3 hours of continuous playbackFor all the audiophiles and music lovers out there, speakers are perfect for you while on the go. If you want to operate your music and files on your mobile phone, get this Capdase..