This product is good for the following Models and Part# 9V 3A DC Power Supply Adapter with 2.5mm x 5.1mm Tip Center Positive Note:If you have a different model not listed above, please email us to check compatibility. Item Descriptions: Intelligent chip inside Output Protection: Complete OVP, OCP, SCP Protection: OVP: Over Voltage output Protection OCP: Over Current output Protection SCP: Short Circuit output Protection High efficiency and low power consumption In great working condition Safety Approval: CE, CCC, RoHS Return & Refund: To give you best shopping experience and save your time .Please Do Not click "Return this item" except that you just don't need it anymore. Please click "Contact seller" via Ebay Message(protected by Ebay),that is the fastest way to solve any problem for you.