Ear Tips: The ear buds comes with three pairs (S, M, and L) of silicone rubber ear tips, ensuring you get an airtight fit regardless of the shape or size of your ear.
Rechargeable Batteries: Each of the JBL Tune 120 TWS ear buds contains a 3.7-volt 85mAh Lithium-Ion rechargeable battery. The charging case contains its own rechargeable battery for over 16 hours of total backup charge. Fully charged ear buds provide up to 4 hours playback time via Bluetooth. The ear buds charge in the case in less than two hours. A 15-minute quick charge will give you approximately 1 hour of playback time. The ear buds charge in the provided case with the supplied Micro USB cable.