Product Description DescriptionBlue Max471 Test Voltage range DC3 36VTest Current range DC0 3AAccuracy 2 Red Max471 This module can be used to test the current and voltage.The principle of voltage test based on principle of resistive voltage divider design can make thered terminal connector input voltage to 5 times smaller. Arduino analog input voltages up to 5 v the voltage detection module input voltage not greater than 5Vx5 25V . Arduino AVR chips have 10 bit AD so this modulesimulates a resolution of 0.00489V so the minimum voltage of input voltage detectionmodule is 0.00489Vx5 0.02445VFeatures Test Voltage range DC3 25V or DC3 16.5V Test Current range DC 0 3AExample GY 471 This module can be used to test the current and voltage.The principle of voltage test based on principle of resistive voltage divider design can make the red terminal connector input voltage to 5 times smaller. analog input voltages up to 5 v the voltage detection module input voltage not greater than 5Vx5 25V . AVR chips have 10 bit AD so this module simulates a resolution of 0.00489V so the minimum voltage of input voltage detection module is 0.00489Vx5 0.02445V.The MAX471 chip on the board used to test the consume current of the load.Paramenter Test Voltage range DC3 25V or DC3 16.5V Test Current range DC 0 3APackage includes 1PCS MAX471 3A Range Votage Current Sensor Professional Module For arduino