Sonifex RM-HD1; HD-SDI Expansion Card for Reference Monitors; for listening to uncoded, linear PCM audio streams from an SD/HD-SDI video signal; Connectors: 1x HD-SDI Input BNC 75 Ohms, 1x HD-SDI Output BNC 75 Ohms; Dimensions: 150 x 31 x 115 mm (WxHxD)