High purity oxygen-free copper with tin-plated, specification features high conductivity, low resistance and soft, can be bent arbitrarily. Max Voltage: 300V, Max Current: 3.5A-4A, Color: 4 Color optimum working temperature from -20 to 80. Connection extension for led light strip, electronic appliance and equipment, transformer, lamps and motor lead wire connection, led splitter connection etc. Easy to use: Cut to whatever lengths you need. Use the wire stripper to strip partial external plastic of the extension cable, then access it to your device.