Accessory USA 5V 4A AC/DC Power Supply Replacement Adapter with 2.5mm x 5.5mm Tip Center + Products trademarked Accessory USA are marketed and sold exclusively by Accessory USA Store. Warranty:30 days Money Back Promised/60 Days Free Exchange With Paid Return Label/365 Days Anytime Worry-Free Warranty!**100% MONEY BACK GUARANTEE !! IF OUR PRODUCT CAN NOT WORK WELL** Output : 5V 4A