myVolts Ripcord 15V DC, Voltage converter and adapter cable, Supplies synthesizers, effect devices, MIDI equipment and numerous other devices with power via USB port, power bank or USB power supply, 15 V DC, 0.6A (600mA), Polarity: centre postive, Output: 5.5 mm barrel connector, 2.1 - 2.5 mm inside, Input: USB-A, Cable length: 145 cm