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Boss PH-3 effect pedal specifications 

Nominal Input Level -20 dBu
Input Impedance 1 M ohms
Nominal Output Level -20 dBu
Output Impedance 1 k ohms
Recommended Load Impedance 10 k ohms or greater
Residual Noise Level -92 dBu (IHF-A, Typ.)
Connectors INPUT Jack, OUTPUT Jack, EXP/CTL Jack, AC Adaptor Jack (DC 9 V)
Power Supply DC 9 V: Dry Battery 9 V type (6F22/9 V),
AC Adaptor Current Draw 50 mA (DC 9 V)
Accessories Dry Battery 9 V type (6F22/9 V)
Options AC Adaptor (PSA-Series), Expression Pedal (Roland EV-5), Footswitch (FS-5U)
SIZE AND WEIGHT ( INCL. BATTERY )
Width73 mm 2-7/8 inches
Depth129 mm 5-1/8 inches
Height59 mm 2-3/8 inches
Weight 420 g 0 lbs. 15 oz.