Koolertron 7.0" Non-blue Screen Ground Station FPV Monitor for Aerial Photography and Camera Monitor Video RCA Input 450cd Brightness Designed specially for FPV and outdoor operation purpose Doesn't have "blue screen" problem when the signal gets weak Supported video format: NTSC M, PAL M, NTSC BG, PAL N, NTSC DK, PAL DK, PAL I SECAM BG Viewing Angle: 70/70,50/70(L/R,U/D) When VTX is not connected,it just show static, never turn blue or black