Prototyping new products today is relatively easy. Having electronics engineering skills, CAD 3D modelling knowledge and micro controllers programming skills, new products can be developed in days.

Full service package. From business requirements to fully prototyped electronic device. While there are many SBC electronics providers, my favourite technologies would be:

Arduino, Jetson nano

CAD using Trimesh python to produce 3D models

PETG 3D pringting

Complexity, like GSM, LTE, CSI computer vision, moving parts, can be extended on demand.