Can't afford a $5000 certifier but need more than your $200 tester offers? The Real World Certifier (RWC) peforms sophisticated timing, crosstalk and cable construction tests to display cable category (Cat 5E, CAT6, etc.), propagatirforms sophisticated timing, crosstalk and cable construction tests to display cable category (Cat 5E, Cat 6, etc.), propagationnd other maladies that affect cable performance. And for hubs, switches and NIC cards, the RWC displays the device's signal level(s) and device type (10, 100, 1000Mb/s, half and full duplex). This is useful in determining signal strength at the end of a lludes the main unit, a toner probe, carrying case and one hour instructional DVD. Compatible with all network devices.