Specifications:Port:RJ11/ RJ45/ BNC /USBPower:9V Alkaline battery (not included)Color: whiteSize: 160*85*25mmModel Number:NF-3368 Features:Simple one-button test.Single key test, very simple.Simple operation, fast, automatic power-saving function, low voltage prompt function.Can test the network line, telephone line, BNC line, USB line connection.Detachable module for testing remote points.