... a jack identifier, cable tester, length measurement device, network tester and optical power tester Cable Tester:Highlights Handheld, Economical, easy-to-use Cable length test ... on hubs or router POE(Power Over Enternet) test Fiber optical power test Trace Route Net ScanSpecifications Support 10/100M RJ45 ... no backlight; 15 hours Network testing and no backlight Cable Tester