The CTX200 Pocket CAT from Byte Brothers is a cable tester with RJ45 and Coax cable connections. It can test Cat 5 and Cat 6 cables to TIA568 specifications. A removable RJ45 remote is used to test long and short cables and slides into an integrated drawer for easy storage. The Pocket CAT can also send tone to trace cables, and it's compatible with most inductive toning probes. Pass/Fail results are displayed in one second. Also tests for continuity, opens/shorts, reversals, and split pairs.