SJ-021R Active Video receiver provides extended distance between the CCTV camera Transmission distance of color signal via eCAT5/CAT6 Up to 600m (2000ft) with passive transmitter Up to 1200m (4000ft) with active transmitter Features: PAL, NTSC, SECOM All-systems compatible; Built-in transient protection Six level gain compensation to solve signal attenuation during transmission Excellent noise and crosstalk rejection function Include ground-isolation circuit (floating), cancel interference fringe caused by inadequate grounding Our products are strictly abide by ISO9001 and are 'CE, UL, FCC, MA, and ROHS' certified.