Read more: http://www.timecodesystems.com/products-home/ultrasync-one/
From official Facebook page, about connectors:
"It's a mini COAX rather than a mini BNC. The official connector name is DIN 1.0/2.3 and is an off the shelf connector available from most electronics hardware suppliers. Two cables are provided in the box to BNC (for timecode and genlock) and more will be available."