Boss PSM-5 Power Supply & Master Switch & PSA-120 Guitar Effect Pedal Japan 1983 Used

The PSM-5 can supply stable DC power to maximum of 7 sets of BOSS effect units or any 7 effect units operated on 9V. More than two effect units can be simultaneously switched on or off. Also, by storing the set of the units in the carrying case (BC?-6), you will be released from the trouble to set them up each time you use them.