6+ Hour Battery (Rechargeable) In-Line Microphone & Remote (Play/Pause, Start/Stop, Volume, Answer/End, etc.) Connect via Bluetooth® version 4.2 Pivoting ear-clip creates the perfect fit and seal Sweat Resistant Cable Management Clip The Bluetooth® word mark is a registered trademark owned by Bluetooth SIG, Inc. and any use of such mark by Koss Corporation is under license.