Need to power your Keyboard RJ661? The item we offer here is a myVolts-branded compatible power supply that can be used as a replacement for the AC adapter supplied by RockJam.This 9V high-quality replacement power adapter from myVolts is guaranteeed to be compatible with the RockJam RJ661 Keyboard.The plug fits a US 2-pin wall power socket.This power adaptor is designed to meet the power specification of the RJ661 Keyboard - correct voltage, amperage and tip size.It meets and exceeds all US safety standard, features overvoltage, overcurrent and short circuit protection to protect your device, and is energy efficient.Power cord lost or broken, and you're not sure what you need?Get in touch with myVolts through Amazon, and we'll help - we've 15 years in the power game, know all the devices, and we love to help our customers get exactly the item they need to solve their power problem.