Trendnet TC-NTP1 is an Inline PoE Tester that helps you test and troubleshoot PoE (Power over Ethernet) devices. It has three modes: I-Mode for inline testing, T-Mode for testing PSE devices, and N-Mode for non-standard passive PoE devices. The TC-NTP1 displays voltage, amperage, and wattage of connected PDs, helping you identify power issues.