Here is another motorized bike that you can use under your desk or over it to move your legs and arms. The Sunny Health & Fitness Motorized Electric Under Desk Bike (SF-B0960) has 18 adjustable speeds and 3 programs. It supports bidirectional pedaling.
This motorized under desk bike is great for seniors or those recovering from an injury. It has safety features built-in, so it stops when overheating or tilted.