Most of our Bluetooth device uses a micro-USB charging port powered by 5V. You can refer to the product description.
1. All the TaoTronics Bluetooth headsets are micro-USB charging ports, powered by 5V；
2. The charging port of the old version TaoTronics headset (about to be produced in 2017) is the DC head (external diameter 3.5mm, internal diameter 1.35mm, USB-S-DC cable), and the new version TaoTronics headset is the Micro-USB charging port.