Rockboard USB-A 5V Voltage Converter

Rockboard USB-A 5V Voltage Converter, Intelligent DC Adapter, Converts 5 V USB input voltage into 9 V DC output voltage, Compatible with most effect pedals with negative pole on the center contact and 2.1 x 5.5 mm hollow plug socket, For connection to standard 5 V USB power sources, Max. output current: 500 mA, Input: USB-A, 5 V, Output: 9 V DC, 500 mA, 2.1 x 5.5 mm Barrel connector centre negative middle contact, Length: 30 mm, Weight: 15 g ...