TRENDnet's Inline PoE Tester, model TC-NTP1, is a comprehensive PoE cable tester for network professionals. This compact tool accurately tests PoE++, PoE+, PoE, and passive PoE technologies. The TC-NTP1 PoE cable tester works on active connections, and is designed to sit inline between the PoE source and PoE device. The PoE cable tester then displays real-time PoE information such as wattage, voltage, and amperage for that connection.