LG VELVET Mode D'emploi page 181

Using the Charging Adapter
You can use the charging adapter to charge your phone or move data
while your phone is inserted into the Dual Screen.
1
With the phone mounted on the Dual Screen, connect the charging
adapter to the charging port at the bottom of the Dual Screen as
shown in the figure below.
• Pogo Pin will not function if it is connected in a reverse direction.
• The USB connection via Pogo Pin does not support OTG, audio or USB
3.0. For these, directly connect the cable to the port on the phone after
removing the Dual Screen.
LG Dual Screen (LM-G905N)
Pogo Pin Port
Charging Adapter
180