Flexible and foldable design. 8 hours battery lifeClear sound when taking phone calls or listening to musicConnectivity - 3.5 mm headphone connectorFeatures bluetooth version 4.2. Bluetooth range is 0.39 inchTroubleshoot-sound echoes during a call, adjust the volume by pressing the Volume button or move to another area. Drops in volume or noise depending on the connected device volume. To avoid this, appropriately adjust the connected device's sound