Founded in 2000, Shenzhen Noyafa Electronic Co., Ltd is located at the central part of Baoan District, Shenzhen. It is ahightech enterprise specializing in the network, production and marketing of network and optical communication equipment. Key Features: 1.Great ergonomic design and handy 2..A reliable and economical tool 3.Intuitive operation, no expensive training required 4.Quickly find the pair cables among so many cables 5.The function of speed regulating: choice speed on testing 6.The function of speed and frequency changing: choice speed on testing; choice frequency on looking 7.Provide Earphone used in very noisy environment 8.Security: safety using (the probe can directly contact bare gold line)