The global requirement of technologies able to facilitate the execution of neurorehabilitation therapies at the patient’s home, taking the most of the open-source approach and low-cost 3d-printing technologies to facilitate widespread diffusion, even in poor countries, is the basis and source of inspiration of DUALarm, a low-cost open-source and 3d-printable device for bilateral upper-limb rehabilitation. It has been designed taking the most of 3d-printing technology, limiting as much as possible the number of commercial components. It is an almost-completely 3D-printed plastic (PLA) device standing upon a regular table, with an optional clamp to fix the device, equipped by two handles, one for each side, held by the subject. The core mechanism is made up of a properly supported gearbox, a mode-selection mechanism and a signal acquisition system. First experiments to test the system functionality and usability have been positively carried out.