"Pedaltrain has two new power supplies: The USB-enabled Volto is a rechargeable supply for daisy-chaining several pedals, while the 1250 has eight connections with a few unique appointments. Four outlets power 9V at 500 mA, one is switchable between 18, 15, 12, and 9V at 150 mA, and outlets two to four power 9V at 210 mA and feature mini hex-wrench ports for adjusting output impedance to mimic the response of batteries. pedaltrain.com"