The HLD-4 is an optional power battery holder created especially for the E-3. It is equipped with a shutter release button and other essential dials for easy operation during vertical-format shooting. The body of the unit is sealed to provide the same high resistance to dust and moisture offered by the E-3. The unit can hold two BLM-1 lithium ion batteries like the ones used in the E-3. Features a shutter button for easy shooting when the camera is rotated 90° for vertical-portrait framing. Extends shooting capacity (no. of shots) with two BLM-1 batteries (not supplied) Splashproof and Dustproof design.