You charge the Buzz with the cable included in your box, or any USB-C cable you have. For best results, ensure you are charging your device by plugging the cable directly into a wall charger.
When Buzz is plugged in you will see one red light indicating it has a very low battery (if it was plugged in at low battery status) or green lights indicating which charge level it has reached. One green light means it’s on the lower end and three green lights means it’s fully charged.