[PREMIUM MATERIAL] Our product uses premium material and core wires made of pure copper, which are better than normal copper clad steel phone lines. Gold-plated metal contacts ensure good sound quality and signal transmission | [SIMPLE INSTALLATION] Simply insert the telephone line between the handset and the telephone line and install it manually without any other installation tools | [MULTI USE] Our phone line is 10 feet long, has a 6P4C connector, and has two RJ11 standard phone connectors. Widely used in telephone, fax machine, modem, answering machine, etc | [NOTES] For your safety, please do not use wet hands when using electric parts and appliances | [PACKAGE INCLUDES] 2pcs telephone extension cable 10 FT with standard RJ-11 6P4C plugs at both ends, and 50pcs cable clips