Technical Pro Technical Pro BOOMBOX5 Portable Battery Powered Speaker with USB / SD/ TF Inputs Lightweight & Compact Design Make it the Perfect On-The-Go Speaker Inputs: USB Flash Drive / TF Card, iPod Loading Dock, 1/8'' (MP3) Plays .mp3 from USB/SD/TF Card inputs Records .mp3 files onto USB Flash Drive/SD Card/TF Card from Tuner or 1/8''(MP3) Next, Previous Track, Play/Pause Controls USB flash drive, SD Card, TF Card maximum size: 16GB Record, play and delete undesired tracks Repeat track, repeat all tracks selector 6 pre-set equalization modes and 3 Built-in woofers Microphone input Built-in carry handle Dimensions : 12'' w x 7.5'' h x 5.25'' d