Black Copper NF-488 PoE Checker TesterBlack Copper Barcode Scanner Price in Pakistan is on Inquiry . The BlackCopper NF 488 Power over Ethernet (PoE) Checker Tester is a professional grade diagnostic tool designed to accurately identify PoE standards, voltage, current, power output, continuity, and loopback conditions in network installations. Essential for installers, technicians, and IT professionals, the NF 488 quickly detects whether a switch or injector supports IEEE 802. 3af 802.