The item we offer here is a myVolts-branded power supply that can be used as a replacement power adapter for the Sony WF-SP700N Headset charging case.This 5V high-quality replacement power adapter from myVolts is guaranteeed to be compatible with Sony WF-SP700N Headset charging case.The plug fits a US 2-pin wall power socket.This power adaptor is designed to meet the power specification of the WF-SP700N Headset charging case - 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.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.