Blackmagic Design SmartScope Duo 4K This Item Includes: SDI Video Input: Automatically switches between SD, HD and 6G-SDI. Reclocked loop through output. SDI Video Output: 1 x 10 bit loop through SD, HD and 6G-SDI switchable. SDI Audio Input: 16 channel embedded in SD and HD. SDI Audio Output: 16 channel embedded in SD and HD. Multi Rate Support: Standard definition SDI, high definition SDI and 6G-SDI.