Feature: Heat under load: After the temperature rise changes to stabilize, the rated current is less than 80 °C below 50A; the rated current is not more than 120 °C above 50A. The product can protect the ammeter and assist the ammeter to measure very large currents. It's very simple to use, you don't need to buy an expensive new ammeters to measure larger currents. Will not reduce the measurement accuracy of the ammeter, the precision of the product is: Accuracy level: 2 ~ 4000A, 0.5 level; 5000 ~ 10000A, level 1. Compact size, practical, very good assistant tool for current measurement. Specification: Precision level: 2 ~ 4000A, 0.5 level; 5000 ~ 10000A, level 1. Temperature: -40 to +60 ° C, relative temperature ≤ 95% (35 ° C). Overload performance: rated current 120%, 2 hours Package list: 1 * Shunt Resistor Note: The actual product color may deviate from the photo due to light. There may be a slight deviation in the measurement of product. .Please note that the new type and old type of this product will be sent randomly, and make sure you will not mind before ordering.