SD card speaker for cellphone, laptops, ipod, mp3 Enjoy music anytime . Built-in amplifier with pure, vivid, ... player DVB T Receiver DVD-karaoke player microphone mini SD card portable speaker with bult-in recharge battery specification:Good ... request. Item: sd card speaker 21Specification MINI card speaker Built-in amplifier with pure, vivid, distinct sound Compatible with laptops, iPod, MP3, MP4, ...