The present disclosure discloses an arrangement for measuring a biosignal. The arrangement has a sensor module and a control module. The sensor module has structure for sensing at least one biosignal and a first connector for interfacing with the control module. The control module has a first counterpart connector connected to the first connector of the sensor module, structure for processing biosignal data sensed with the sensor module, a storage memory for storing processed bio signal data, a rechargeable battery for providing operating power for the control module, structure for wirelessly transmitting the processed biosignal data to a computing device, such as a PC, a tablet PC or a smart phone, for post-processing, and a second connector for interfacing with a second electrode.