You can order Mobi with the thumb controls that you want. If you need sliders, scrollers, switches, joysticks, hat switches, buttons, or anything else, you can get them in the combinations you want. This lets you design the controls to suit your application, and lets you customize the hardware in addition to the software. If you want an OCU for general use, you can order two joysticks and eight buttons. Each handle includes a deadman switch positioned so it is easily activated when you are holding either handle.