This is the Konig Cable tester RJ45/USB/COAX [CMP-RCT1] Multi cable tester for RJ45, coax and USB. For all standard UTP/ STP applications (Ethernet, TokenRing, ISDN, USB). Screentest. With the incl. "remote unit", you can check the complete link. Incl. case and manual. Power from internal 9V battery (not incl.) ...Contact us if you need more help.