The ATEM Talkback Converter 4K gives you talkback for up to 8 cameras so the entire crew can stay in touch and take direction during live productions. Featuring advanced 12G-SDI connections the talkback converter gives you full bi-directional video, talkback and tally signals over the SDI program return to your Blackmagic Studio Cameras. That means you don’t need any extra cables to add talkback and tally to your production! The ATEM Talkback Converter 4K also has SFP cages for adding optional SMPTE optical fiber modules when you need to place your cameras far apart at larger venues. That means you can place your cameras up to 28 miles away from the switcher without any loss of signal quality!