BioposturalSysMotion® is an innovative inertial system consisting of a 9-DoF accelerometer based on MEMS technology, applicable to the body and connected via Bluetooth, and software based on a fully graphical interface in MS Windows™. The device was born from the need to create a flexible instrument with broad clinical applicability, combined with extreme ease of use, compared to traditional joint degrees of freedom (ROM) analysis systems. Furthermore, BioposturalSysMotion®, through proprietary algorithms, minimizes ROM reading errors, typically introduced by the operator, thanks to the automatic selection of the acquired signal and its processing.