Color: 5.5 x 2.5 mm LsGoodcare 5 Pack 5.5 x 2.5 MM 5A DC Power Jack Threaded Threaded Mounting Connector Adapter (20 Awg 0.3 sq mm Black Red Wire Leads + 5 Pack Male DC Power Plugs Soldered Power Jack Connector) 5.5 x 2.5mm 5A DC Power Jack Threaded Threaded Connector Adapter Operating temperature range: -30-70 degrees Celsius Rated load: 5A DC30V Contact resistance: less than or equal to 0.03 ohms Insulation resistance: greater than or equal to 100 meters ohm Withstanding voltage: AC 500 V (50 Hz)/min Insertion and extraction force: 3N-20N Life: 6000 times 5.5x2.5mm DC plug specification: Rated voltage: 30V AC, DC Current rating: 1A Contact resistance: less than or equal to 30m ohms Insulation resistance: greater than or equal to 100m ohms Withstanding voltage: 50-60Hz. 500.60S Operating temperature: -40 degrees Celsius +85 degrees Celsius The measurement error of the above information is 0.05-0.2. Suitable for media players, MP3 players, MP4 players, audio-visual equipment, AV equipment, laptops, cell phones, smart phones, PDAs, car stereos, etc. Note: When you solder the center pin, insert the plug plug until the plastic hardens so the insulator doesn't get too much heat to melt quickly.