4. battery level indicator lights There are two battery compartments, which are located at the left and right ends respectively. There are "A" and "B" indicator lights on the front to show the two battery level.
5.1 /4 Standard Screw Hole & Enhance Stability It could be mount on tripod easily and quickly.
6. Enhance StabilityGreat rubber-coat give better hand feeling and extra weight help balance the camera and telephoto lens and anti-shake.