Beautifully made foldable bluetooth headphones that can be used wirelessly, wired or by inserting a sd card into the slot. It is super versatile in that even if the battery runs out, you can still use the included 3.5mm auxiliary cable that it comes with to continue playing your music. Charging the headphones does not take too long and the battery life last for hours before you have to charge it back. They are very comfortable with soft earmuffs that also provides excellent noise isolation to prevent outside noise from ruining your expereince. Portability is also a strength since it can be folded and put away in your backpack.