The Yealink charging base works for BH70 Bluetooth Headsets & WH64 Hybrid Headphone. NO power adapter required, there is a fixed USB cable on the back of the base for connection. NO control function, this BHC70 base can only be used for charging. Any control of the BH70 headset must be performed on the headphones or software It takes 90 minutes to fully charge the BH70 wireless headsets, which is the same as direct charging via USB-A cable The package comes with 1X charging stand