Rockboard Power Ace Polarity Converter, Adapter Cable, For powering effect units, Flat space saving design, From 2.1 x 5.5 mm male female connector (negative) inside to 2.1 x 5.5 mm female (positive) male connector, Exchanges polarity of inner conductor (negative) to inner conductor (positive), Suitable for effect devices with power supply sockets with positive polarity inside
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