The PSA series is the recommended power supply for products including all new BOSS Compact and Twin pedals, Multi-effects and more. FEATURE: 500 mA of current to easily power multiple pedals, even digital ones Power cable length is increased to almost 10 feet LED indicator for quick visual verification of on/off status New design which does not cover adjacent power outlets Input: 230v - 50Hz Ouput: 9v DC 500mA Polarity: center-negative