Belker 5.5 x 2.1mm Jack Reverse Polarity Converter Cable

This is a reverse polarity cable. , 5. 5mm x 2. 1mm male plug and female plug, 12cm cord length. , Use to reverse the center Positive output to center Negative or reverse the center Negative to center positive. , Made by Belker, quality and durable. Max. support 3A Amp current. , Applicable only to power adapters with 5. 5*2. 1mm plug end.