ITEM NAME:DC combo Meter Digital LCD Watt Power Volt Amp RC Battery charging AnalyzeS Gw.Acts like a wire so doesn't affect model's performance. Precision Alu-Chrom current sensing resistor, with only 0.001 Ohms resistance and circuitry that draws only 7 mA. Handles 0 to 60 volts. Works on 12, 24, 36, and 48 volt battery bank systems.