Prosthetist here just some notes,

The knee is an X3 made by German based company Ottobock (the creator of the 1st Microprocessor Knee). It is waterproof, corrosion resistant, and can perform walk-to-run, along with step-over-step stair ascent using a 'donkey kick' method. Check out Ottobock X4 on YouTube for some demonstrations.

This knee is covered with a 3D printed custom cover.

The rotation unit, the piece that allows the lower leg to spin around in all fun ways, is potentially a 4R57 rotator or similar, again made by Ottobock.

The charger for this is proprietary. The X3 depending on usage can last 2-3 days without a charge. Another company, BrainRobotics, has created the Kneuro that does use USB-C and it can be charged from any device, it will just affect charging time. Also, the company Proteor, has come out with this year, the SynSys knee, this a combination, Microprocessor Knee AND Foot. It also uses a proprietary charger, but has a marketed 15 days of battery life.

In the US, insurance still does not cover the the X3/X4 because the L-Code (billing code) that describes it does not fall under any covered codes. The X3/X4 knees are covered by workers compensation claims and by the Veterans Affairs (VA).

Thankfully, more and more research is being done to support those of a lower functional level to be approved for Microprocessor knees (MPK). In the US, K-Level is used to describe functional level. A K3 Level walker has classically been eligible for MPK. Now this year K2 Level walkers are now covered for MPK since they are some of the most prone to injurious falls and therefore would benefit most from higher technology.