These headphones can be used for jogging, bike riding, any number of indoor and outdoor. You can connect them via bluetooth to your phone or other bluetooth source (TV, etc). You can also play MP3 music and audiobook files directly by installing a micro-SDcard in the neck unit. They come with spare earpads and a USB charging cable. The sound is quite good! We purchased them as a present for one of our grandchildren and are sure he or she will like them (shhh, it's a secret).