HDE Rechargeable Digital Mini LED Travel Pocket Speaker Clock FM Radio MP3 Player and Micro SD Slot 3-in-1 portable digital speaker, MP3 player and pocket FM radio Has a USB port for music loaded onto a flash / thumb drive, an SD card slot as well at the typical headphone jack size of a 3.5mm auxiliary cable Small enough to fit in your pocket; has high fidelity audio producing crisp and clear sound on a mini speaker Lithium-ion battery rechargeable via any USB port Bright LED lights flash different colors when speaker is turned on for a fun novelty display