OdiySurveil(TM) 8 Channel RJ45 BNC Passive UTP Video Balun Transmit Transceiver for CCTV Camera DVR OdiySurveil(TM) 8 Channel Passive Video Balun; Casing Material : Alloy, Port : RJ45 BNC;Frequency Response : DC - 8MHz;CMRR (Common Mode Rejection Ratio) : 60DB;Impedance : BNC: 75ohm, RJ45: 100ohm; Working Temperature : -10C - 70C;Storage Temperature : -30C - 70C; Applicable Range : NTSC, PAL, SECAM and CCIR Systems Dimension:6.2"x 3.5"x 1.1"(L*W*T);Weight:350g;Do not compare with other simple quality.