Description: Material: Muscle electrical sensor module is made of electronic component and ABS material, with stable performance and long service life.Use: Muscle activity sensor can detect muscle activity, structure by detecting EMG.Easy to use: Muscle sensor board is simple and convenient to use, saving time and effort.Design: Muscle sensor module is compactly designed, designed for microcontrollers, sends data, and can also be connected to breadboards.Principle: Muscle activity testing can measure the filtered and rectified muscle electrical activity output volts, and its output size depends on the amount of muscle activity you choose. Specification: Material: Electronic Components ABS Size Chart: Sensor module: 3.5cmx2.8cm/1.38inchx1.10inch Package Includes: 1x Muscle sensor board1x Professional EMG cable3x Disposable surface electrodes Note: Please allow slightly errors 1-2cm differences due to manual measurement.