WS-PoE-Tester - Inline Tester For Power Over Ethernet | Display 20 to 56 Volts, 0-5 Amps And Display Actively Used Power 802.3af/at and Passive PoE at 10/100/1000 Data Rates PoE Tester/Detector for passive, 802.3af and 802.3at applications, 10/100/1000 data rates Measures and displays Voltage, Current and Power while allowing full ethernet operation 2 independent volt meters, test mode B PoE (pins 45, 78) from 20v to 56 volts Test mode A PoE (pins 12, 36) from 20v - 56 volts or DC power supplies from 5v to 56 volts Expert USA Tech Support - call 512 479 0317