Only the case is charged when needed with the supplied USB-C cable. This gives you up to 35 hours of listening pleasure. Tapping on the earphones activates the functions: Play/Pause, Next Track/Last Track, Volume, Answer/End Call, Voice Assistant and Low Latency option.In-ear detection sensors ensure that music automatically stops when you remove an earphone and continues playing when you reinsert it.Immediately after removal from the case, the EarFun earphones are automatically connected to the last device. When you insert them into the case, the Bluetooth connection is automatically disconnected, the earphones are switched off and charged by the case.The package includes 3 pairs of silicone earplugs in different sizes. Choose the most suitable size for you. This way, the earphones stay firmly in your ear even when you're exercising or running. And with a quick charge of 10 minutes with the charging case, you can listen to music for 2 hours.