The Byte Brothers RWC1000K Real World Certifier (Printing) tests UTP cables and LAN devices for cable type (CAT3, 5, 5e, 6) and speeds from 10, 100, and 100 MB). This certifier can also test coax cable length, open, shorts, and distance to fault. It stores the readings of 250 tests for printing. Cables can be named on the fly before storing. Stores 250 tests for later printing Cable category CAT 3, 5, 5E, 6 Data levels of real live data (from any device) Real world certify network cable for 10MB, 100M or gigabit capability Test existing cables for higher speed compatibility Detect worn connectors and faulty terminations Spot faulty wiring jumpers from your office wall outlet Identify excessively noisy cables and worn connectors Decode 10/100/gigabit PCs, switches and hubs for advertised capability Go "inline" between two LAN devices and identify the negotiated speed Test 10/100/gigabit PCs, switches and hubs for data signal levels Perform your own inspection on newly purchased devices and cables Identify network bottlenecks cause by slow running links Length (real TDR) propagation delay and skew Ideal for both LAN managers and cable installers 1 year warranty for parts and labor Other model