Usage Tips:Quantity: (2 pairs) Size: Length7 inch / 19 cm) Material: (Plastic). The color: (Black) Connectors 1: RJ45 socket to BNC male / DC male, Connectors 2: RJ45 socket to BNC male / DC female. Compatible with CVI, TVI, CVBS and AHD video devices, suitable for 1080P 3MP 4MP 5MP 8MP CCTV cameras, monitor, DVR card and recorder etc. Easy installation, using standard UTP CAT5 cable system and power supply low voltage. The LED indicates (the green light) is working, the model (the yellow light) is not working. Video transmission via UTP CAT5. Note: Supply voltage drop calculations: For 12V DC 1Amp, cable distance should not exceed 90 feet / 27 meters. For longer distances please use 14V DC, 16V DC, 18V DC, 20-48V DC. Note: The RJ45 video balun is not waterproof. For indoor use only.Make sure the rj45 for camera side and DVR side are the same standards.Incorrect color mixing may cause camera and devices to burn out. Quantity: (2 pairs) Size: Length7 inch / 19 cm) Material: (plastic). Color: (black) Connectors 1: RJ45 to BNC male / DC male, Connectors 2: RJ45 to BNC male / DC female. Compatible with all HD-CVI, HD-TVI, HD-AHD. (CVI/AHD/TVI) Maximum distance length: (1080P 3MP 4MP 5MP 8MP: 200m/656ft) (720P 960P: 250m/820ft) (CVBS/Analog) Max Distance Length: (960H: 300m/1000ft) If these baluns are used outdoors without shelter, please wrap them with waterproof tape after connecting them to your cameras.