10-Turn Power Supply has max 15-Volt output 2-Amp. Power supply is 110-120 and 220-240 Volt will work almost everywhere, but the plug is for USA and you may need a adapter if you are using it outside of the USA. Dimensions: Length: 5.5" Width: 3.25" Height: 1.5" Available in RED, BLUE & GREEN Special Note: Knob will show that it can only go up to 10 points. Every 1 points equals 1.5 Volts. Maximum Voltage output is still 15 Volts.