The TW3001AR is a single-channel active receiver that can receive live video over unshielded twisted pair (UTP) cable. The adaptive technology in the TW3001AR automatically adjusts the low, medium and high frequency components of the video signal allowing for the best possible video transmission. The adaptive technology eliminates the need for manual adjustment by automatically adjusting to provide the most favorable video transmission depending on cable length needed. The unit has been optimized for use with Cat5e and Cat6 cable, although Cat3 and Cat5 cable can be used for shorter distances. The DIP switch on the bottom of the TW3001AR allows you to override the adaptive technology and manually select the cable distance. Switches 1, 2, 3, and 4 can be set to 4,000 feet (1,219 meters), 3,000 feet (914 meters), 2,000 feet (610 meters), and 1,000 feet (305 meters), respectively. Switch 5 can be set to high mode and low mode. There are two ways to power the TW3001AR. You can power it by installing it into an RK5000PS-3U using the 4-pin connector. For stand-alone power, you can use the 2-pin power connector and use either a 12 VDC power supply (supplied) or a 24 VAC power supply.