Features: The MAX471 Voltage and Current Sensors Module is design for enthusiasts, offering precise voltage measurements from 3V to 25V and current readings up to 3A, making it essential tool for accurate monitoring in various electronic projects. This module can be used to test current and voltages. The principle of voltage test base on principle of resistive voltage divider design, can make the red terminals connectors input voltage to 5times smaller. Analog input voltages up to 5v, the voltage detection module input voltage not greater than 5Vx5 = 25V (if using 3.3V systems, input voltage not greater than 3.3Vx5=16.5V). AVR chip have 10bitAD, so this module simulates a resolution of 0.00489V (5V/1023), so the minimum voltage of input voltage detection module is 0.00489 Vx5 = 0.02445V. The MAX471 chip on board used to test the consume current of the load. Specifications: Component:Plastic Size:Approx.20.6x19.1mm/0.81x0.75inch Test Voltages ranges: DC3-25V or DC3 -16.5V (works on 3.3V) Test Current ranges: 0-3A Package Includes: 1pc Voltage Current Sensors Module note: Please allow 1-10mm errors due to manual measurement. Due to the differences between different monitors, the picture may not reflect the actual item color.