With the function button located on both in-ear headphones, you can conveniently control volume (double press), skip to the next track (press and hold the right earbud for 3 seconds), go back to the previous track (press and hold the left earbud for 3 seconds), play/pause music (single press), answer phone calls (single press for incoming calls), and activate voice assistants (Siri/Google by triple pressing) all with one hand. To charge, simply place the in-ears into the charging case (up to 8 times possible if the charging case is fully charged). The charging case itself can be charged via Micro-USB or wirelessly (Qi-compatible). Additionally, the charging case can be used as a power bank through the USB-A port.