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The Varavon Coupler for Sony a7S can function as a continuous external power source for Sony a7S, and with no need to stop and switch batteries. The coupler’s intuitive design makes it a compact product that fits well and without interruptions in your camera and on your rig.
The a7S Coupler connects to the external power source (portable battery or other) via the included cable, and the other side goes inside the camera battery door.
Weight: 0.06lbs (30g)