ITEM NAME:30A 1 Channel DC Motor Driver Moto Shield Module with Voltage Protection Board Product Description Description: Feature: 1. Compatible with 3V input. 2. The maximum frequency of PWM is 20Khz, which can drive ultrasonic and silent motors. 3. Current sensor output proportional to motor current (140 mV/A, and only works when H bridge is driven). 4. The motor indicates the LED lamp, when there is no motor connection, it can indicate the output state. Protection Function: Reverse Voltage Protection-16V Input voltage 41V, no damage Overvoltage and undervoltage protection Thermal shutdown of upper and lower bridges. Specification: Working Voltage 5.5V-24V Output Current: 12A Working Current (Maximum Current up to 30A) Product size: 37mm*27mm*8mm/1.45*1.06*0.31'' Packing weight: 11g Note: Please allow 1-3cm differs due to manual measurement. Due to the different display and different light, the picture may not show the actual color of the item. Thanks for your understand. Included: 1 X 1 Road DC Motor Driver Module.Output Current: 12A Working Current (Maximum Current up to 30A). Current sensor output proportional to motor current (140 mV/A, and only works when H bridge is driven). The motor indicates the LED lamp, when there is no motor connection, it can indicate the output state.