ITEM NAME:1pc Current Sensor Module Output DC Current Detection Module for Description: 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 AVR chips have 10-bit AD, so this module simulates a resolution of 0.00489V (5V/1023), 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. Specification: Material: Plastic Color: As picture show Size: Approx. 20x28x6mm/0.79x1.10x0.24inch Package Includes: 1 piece Current Sensor Note: Pls allow an error of 1-3mm due to the difference of manual measurement..1 piece Current Sensor. Color: As picture show. Size: Approx.