Described herein is a modular system for a system for electrically stimulating a biological tissue, which includes: a first device (32) including a number of electrodes (45), which in use contact the biological tissue and a second device (34) including an electronic control circuit (55), which transmits stimulation signals. The second device may be operatively coupled in a releasable way to the first device, in such a way that the first device receives the stimulation signals transmitted by the second device.
