Product information "SparkFun MyoWare Proto Shield"
This is the MyoWare Proto Shield, a simple proto-board for your MyoWare Muscle Sensor. With this shield you will be able to use the area provided to solder on whatever custom circuitry you can come up with. This shield provides 8 x 15 solderable through-holes on a standard 0.1" grid.
The MyoWare Proto Shield is equipped with two rows of 3-pin plated through-holes on each end of the board. This allows for standard 0.1" headers to be used to stack the shield with other MyoWare boards.
The MyoWare Muscle Sensor, that this shield attaches to, is an Arduino-powered, all-in-one electromyography (EMG) sensor from Advancer Technologies. The MyoWare board acts by measuring the filtered and rectified electrical activity of a muscle; outputting 0-Vs Volts depending the amount of activity in the selected muscle, where Vs signifies the voltage of the power source.