RockBoard ISO Power Block 10 v2multi power supply for effects pedals 10 transformer isolates power slots advanced filter technology prevents high frequency noise external transformer prevents low frequency interference max. total current output 2. 000 mA 8 x 9V power outputs @ 150 mA each, 2,1 x 5,5 mm barrel plug, polarity ( ) center 2 x 18V power outputs @ 400 mA each ), 2,1 x 5,5 mm barrel plug, polarity ( ) center individual status LEDs and short circuit protection for all 9V