The Yealink charging base (BHC70) 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, NOT include BH70 Dual / Mono headset.