Leader LV 7380 Multi-Screen Dual HD/SD-SDI Rasterizer. In good condition, uses a standard 12-volt 4-pin XLR power supply, not included.  Mission 1 button cap, see photos. 

The LV7380 Multi-Screen Dual HD/SD-SDI Rasterizer offers simultaneous display of 2 HD/SD-SDI inputs such as picture, waveform, vector, 5-bar, audio, status as well as CINELITE and CINEZONE representation. Since it displays technical information in a creative and user-friendly manner, it is suitable for use in production houses and studios.