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 14.4 v to standard 7.4 v 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.