Littlite XR-4 Series console lights feature the littlite LLX, right angle 4-pin XLR style connector and are fully comparable with all major sound and lighting consoles with a dedicated XLR task light connector. The PRO2/PRO2C series feature XLR pin orientation to accommodate PRO2 back panel. Sold as left and right models and as a pair. Use 18XR-4-HI MR for PRO2C and right side of PRO2.