The EU-V3 transforms the C500 Mark II and C300 Mark III into versatile live production systems with the addition of many key features. The Expansion Unit has a 4-pin XLR DC power input, powering both the EU-V3 and the camera body. A return video input and Ethernet port with tally that also allows remote control of camera settings similarly adds key features for studio or live event production. Additionally, the EU-V3 includes a Hirose 12-pin port for lens control and power, an industry-standard v-lock battery mount, menu navigation and 4 assignable buttons.