This is the nicest bluetooth speaker I have ever bought. It is big and beefy and has excellent sound quality. It is versatile as well, not only can you use bluetooth connection, but you can plug in a micro-sd card (they call it a TF card) and play music from it. An 8gb SDCard will hold about 70 hours of music in MP3 format, so you can have music at your desk all week and never repeat a song. There is also a USB cable for charging and an AUX cable for plugging into non-usb devices (portable MP3 players or whatever). This is definitely a keeper!