Objective. Design a low frequency Neuromuscular Electrostimulation prototype with modifiable digital parameters through the Arduino platform. Methodology: The following work shows the design of a low-frequency neuromuscular electrostimulation equipment prototype with similar characteristics to conventional devices but with a unique design in its programming, this prototype allows modifying the parameters of intensity, time, pulse duration and Frequency through the Arduino platform, this HARDWARE is based on simple analog and digital boards that allow reading input and output data on the device. This prototype emits a symmetrical biphasic current of rectangular pulses and although there is a great variety of currents within the Neuromuscular Electrostimulation (EENM) focused on improving and maximizing the activation of a muscle, generally the symmetric biphasic pulses are better tolerated to the passage of a current through subcutaneous tissue, with greater effectiveness in depolarization of thick fibers of intact nerves. Contribution: To offer alternatives for the management of digital devices in electrotherapy.