DPDT Relay Module Reverse Polarity Switch ARDUINO UNO MEGA Development Board

features that you will surely need! You don't need to be very professional, it's very easy for you to understand the usage. Do not hesitate to ask us for our recommendation to ensure the best possible feature and function that will work out for you!
Features:
Small size, convinent for carrying and storing.
Sufficient voltage and steady current.
Easy to operate and very safe.
Good in quality but inexpensive.
All the product will send after good package.
Widely-used, suitable for many kinds of electric appliances.