1)The 15W power supply is not brand new.They are not used but there might be some scratches and dirty marks from bulk packing and shipping. 2)The Amazon devices comes with power supply of various specifications,pls check the features and specifications of your original power supply carefully. Compatibility(reference only) Echo Dot (3rd/4th Gen), Echo Dot (3rd/4th Gen) with Clock, Echo Dot (3rd/4th Gen) Kids Edition, Echo Show 5, Echo Spot, and Fire TV Cube
eBay