Ensupra DC Electricity Usage Monitor; 150Amp Power Analyzer; Battery Consumption; Performance Monitor ;DC Watt Mater for RC,Battery,Solar,Wind Power; 2 Year Warranty Simple to connect: Connect 'SOURCE' Red wire to positive(+) and Black to Negative of battery or any DC electricity source. Similarly, 'LOAD' wires should be connected to any DC electricity based load Made for Heavy loads 130Amp with precision of 0.01Amp. Records Amp-hour and Watt-hour. Instant live display with backlit Like an inline a wire line, drawing negligible 7milli-amp to show live readings and records data. Precision current sensing resistor, with only 0.001 Ohm resistance. Use also for RC cars & planes fine-tuning for great performance. Measures energy (Wh), charge (Ah), power (W), current (A) and voltage (V) for any rechargeable battery pack from 4 - 60V, including NiCd, NiMH , and SLA, and Li-Ion battery packs WARRANTY: TWO YEARS (MUST BE USED WITHIN LIMITS OF 60VOLT 150AMP DC). Search 'ENSUPRA' for your solar and other clean energy products