Anton Bauer 8075-0318 P-Tap to Sony A9, A7rIII , A7sIII connector with 20" cable powers the Sony A9 or A7rIII camera using your Titon Base. Voltage converter box mid cable adapts 14.4v to standard 7.4v required by camera. Reverse polarity protection is built in so if the cable is plugged in backwards to a P-Tap, it will not be damaged.