USED The earbuds have no issues, they are new and were used once. The reason for selling is that I received another pair as a gift. 1. Sound and Isolation Active Noise Cancellation (ANC). Transparency mode to hear your surroundings. Spatial Audio that tracks head movement. Sound isolation during calls. 2. Battery and Charging Up to 8 hours for the earbuds on a single charge with ANC. Up to 24 hours with the charging case and ANC. USB-C, MagSafe, and Qi wireless charging. Five minutes in the case gives about an hour of listening. 3. Additional Features IP57 dust, sweat, and water resistance. Heart rate sensor for workouts. Volume control by swiping on the earbud stem. Locate earbuds and case via Find My. Hearing test and hearing protection features. Condition: Used