GREENERY/BXT&reg; T-2020 Fashion Portable Rechargeable Mini Speaker with FM/TF Card Slot/AUX Fit for iPod,MP3,MP4 player,PO&Moblie Phone-Powerful Loud and Clear Sound;Red,Blue,Silver&Black available (BLUE, T-2020) Convenient to use, easy for carrying ,offer you an incredible sound quality Compatible with MP3/MP4/PO/Moblie Phone and any other music player device Lithium-ion rechargeable battery provides up to 4 hours of wireless play--no need to buy batteries Simple on/off switch on the bottom of the unit;Package included:1x Mini speaker;1x USB cable