OdiySurveil(TM) 4 Channel Aluminium Alloy Shell Passive HD-CVI/TVI/AHD CCTV Camera Transceiver,BNC RJ45 UTP Video Balun,720P/1080P Shell Material:Aluminium Alloy with pure copper BNC connectors,Product Name: 4CH Passive HD Transceiver; Size: 11.2 x 5.2 x 2.5cm ;Weight: 180g;Anti-interference: 60db; BNC Male Impedance: 75ohms,UTP Cable Impedance:100ohms;Resolution: 720P/1080P; No power required, Built-in transient suppression protection; Working temperature:-10C~55C;Storage temperature: -20C - 70C;Humidity: 0~95%(non-condensing); Package Content : 1 x 4CH Passive HD Transceiver ; 1 x Manual;OdiySurveil(TM) Brand product with the best quality and more efficient signal transmission,do not compare with those junk materials.