Hawk-Woods VL-C300 V-Lok power distribution box. This V Mount battery plate has 5x regulated 12v D-Tap outputs and a 5x2.5mm input cable for use with Canon C300s and any 12v camera/accessories that use D Tap or 5mmx2.5mm cable input. Cable could also be adapted to suit other cameras or cables. Also has an on/off switch.
eBay