Description Precision Bluetooth earbuds in a compact carry case with its own built-in power supply. The earbuds produce crystal-clear stereo sound and can also be used for taking phone calls. They will play music for up to three hours and are easily recharged by placing them back in the carry case. The case will charge the earbuds 2-3 times and it is easily recharged from any USB port or a mains adapter. Tempo is supplied with a Micro-B USB cable and an instruction leaflet.