Welcome to our store! Heat Under Load: After the temperature rise changes to stabilize, the rated current is less than 80 °C below 50A; the rated current is no more than 120 °C above 50A. The product can protect the ammeter and help the ammeter measure very large currents. It is very easy to use, you don't need to buy an expensive new ammeter to measure larger currents. Will not reduce the ammeter's measurement accuracy, the product's precision is: Accuracy level: 2 ~ 4000A, 0.5 level; 5000 ~ 10000A, level 1. Compact size, practical, very good auxiliary tool for current measurement. 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 no more than 120 °C above 50A. The product can protect the ammeter and help the ammeter measure very large currents. It is very easy to use, you don't need to buy an expensive new ammeter to measure larger currents. Will not reduce the ammeter's measurement accuracy, the product's precision is: Accuracy level: 2 ~ 4000A, 0.5 level; 5000 ~ 10000A, level 1. Compact size, practical, very good auxiliary tool for current measurement. Specification: Current: 50A; 100A(Optional) 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 Voltage drop: 75mV Package List: 1 * Shunt Resistance Note: The actual product color may deviate from the photo due to light. There may be a slight deviation in the measurement of the 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.