This document describes the visual inertial sensor network which the workers wear in some use cases within the HumanTech project. The focus of this deliverable lies on the hardware properties as well as its calibration. As part of this hardware, the local processing device will be introduced as well. It is planned, that this powerful device will also host other applications in the context of the worker, such as the localization of Task 4.3 and the exoskeleton controller with intention prediction of Task 4.2 and will exchange data with them. The output of D4.1 is mainly used to predict the wearers intention in T4.2 but it may also interact with T4.3. It will be demonstrated within Pilot 1.