Specifications Operating Voltage 3.7-6V DC power Microcontroller ATmega328 Product Dimension 90 x 79 x 18mm (3.54 x 3.11 x 0.71inch) Package Dimension 110 x 150 x 10 mm (4.33 x 5.91 x 0.39inch) Net Weight 43g (1.52oz) Gross Weight 47g (1.66oz) Package Content 1 x mCore