BSH-53TW are very small, wireless in-ear headphones. They consist of two compact earpieces without a cable connection that deliver stereo sound like a Bluetooth headset. The built-in microphone allows the headphones to also be used as a hands-free headset for phone calls. The rechargeable battery guarantees up to five hours of playtime or up to four hours of phone conversation. The control buttons on the earbuds are easy to activate.