Video Balun Compatible with all HD-CVI/TVI/AHD & CVBS Compatible with 720P/960P/1080P/3MP/4MP/5MP Built in solid state TVS (Transient voltage suppressor) for surge protection No power required stackable  for Neat installtion ABS engineering plastic housing 60dB crosstalk and noise immunity Lightning protection design grade:III Wave Filter design, Anti-statit design Real-time transmission over UTP Cat5e/6