The Just Add Power 2Gohm/3G+ SDI POE transmitter adds SDI support to the 3G HD over IP system and has all of the features of SD/HD/3G-SDI formats. Stereo output with audio delay. Local HDMI loopout. Null modem-integrated RS232. HDMI pass-through. The 2Gohm/3G+ SDI POE transmitter is fully compatible with all 2Gohm/3G and 3G devices. Add an SDI source to your HD over IP system without the need for an SDI-HDMI converter.