XP-A/GP-A:
The XP-A or GP-A mount on to the camera to provide a quick and secure connection with 3-Stud mount batteries. GP-A includes a bi-pin power port to power an on-board light. XP-A adds a Data I/O Camera Connection and Automatic Light Control(ALC). ALC automatically turns the light on/off in conjunction with the VTR. (Please check for camera compatibility. )

S-GP-A:
The S-GP-A is a temporary solution to allow the use of 3-Stud batteries on V-Type configured cameras. It can also be used as a charge adapter, enabling you to temporarily charge 3-Stud batteries on PRO-X series V-Type charging equipment.