It looks like you're asking about — likely referring to a specific version or model of an electro-stimulation (e-stim) device, possibly from a brand like E-Stim Systems (whose firmware/device versions sometimes include numbers like v2, v91, etc.) or a DIY/community-driven e-stim project.
Mobile generators are suitable for use on the move rather than in a fixed location, just like portable products, which are mostly found in vehicles. This system is generally installed on vehicles such as trucks, vans, minibuses, and enables the generator system to meet its electricity needs regardless of location and location. It is functional in meeting the power need in large organizations such as concerts, festivals and construction sites.