Syba SY-ACC65050 2-Piece Multi-Network Cable Tester for RJ45, RJ-11, RJ-12, Coaxial, and Modular Cables, RoHS Specifications: Testing Ports for: - RJ45 (UTP STP), 10/100 Base-T, and Token Ring Cables - RJ-11/RJ-12 USOC Telephone/Fax Cables (8P8C, 6P6C, 4P4C) - Coaxial BNC and TNC Cables Test cable for Continuity, Short, Open and Cable Types Coaxial Cable Port: Shows Cable Conditions Including Shorts, Shield Opens and Center Conductor Breaks Separated Remote Unit Allows One Person Testing Power Source: DC 9V Battery (Not included) Dimension (Master & Remote Units): 4 x 4 1.2 Tester is for LAN cable test only. Do not use on CATV cable or LAN connection or electric circuit