These headphones are designed to stay put when used with the supplied ear hooks. The 3D Active Fit design employs a ball joint to keep the headphones aligned in your ears, improving sound and stability. The SE-E7BTM conveniently clips to your clothing to limit movement while you stay active. Utilize the in-line remote to enjoy your music and answer calls. Qualcomm® aptX™ Bluetooth® wireless offers enhanced audio, superior to standard Bluetooth, allowing you to enjoy up to 7.5 hours of battery life.