The SainSmart MEGA, ATmega2560 is a microcontroller board based on the ATmega2560.
The SainSmart sensor shield can connect to various modules like sensors, servos, relays, buttons, potentiometers.
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Technical Details

Size (LWH): 4.1 inches, 3.9 inches, 2.1 inches
Product Details
Product Dimensions: 4.1 x 3.9 x 2.1 inches
Shipping Weight: 0.25 pounds (View shipping rates and policies)
ASIN : B0076H2UC6