This high-bright digital panel meter is a universal circuit that can be used as a voltmeter, ammeter, thermometer or any other measuring device. The instruction manual has detailed instructions on how to set up the circuit to perform different kinds of measurements. The circuit features high precision and high input impedance. Voltage: 5VDC @ 150mA. Recommended adapter: RP-0530R-P. As kit contains solder it may not be available for purchase in California.