Designed for surveillance, high reliability and stability. 4K resolution is 4 times 1080P can own broader view and more abundant details. HDMI support up to 4K@60Hz. Multiple inputs: HDMI, VGA, RJ45, USB. Build-in speaker, Audio 8W*2. Narrow front Bezel. Screen Size 42.5 inch (968.2x559.4x60.9 mm). Brightness 400 cd/m2 (Typ.). Contrast 1200:1. Active area: 941.184(H) x 529.416mm(V).