Featuring Shokz signature open-ear design, an adaptable ear hook for improved comfort and weighing only 8.7 g, the OpenFit Air headphones are a must-have for audio on the go. Details: Open-ear comfort and situational awareness Air-earhook for a secure fit Balanced natural sound Earbuds: Up to 6 hours of listening time with a single chargeEarbuds with Charging Case: Up to 28 hours of listening time