The Klein Tools LAN Scout Jr. 2 Data Cable Tester is a reliable tool for testing Ethernet Cat 5e, Cat 6, and RJ45 cables. Made by Klein Tools, a trusted brand in the industry, this computer cable tester is designed to accurately identify problems in your network cables. With its compact and sealed packaging, you can be sure you are getting a brand new, high-quality product to help you troubleshoot connectivity issues with ease.