Potentiometer Kit Color Black/Clear Compatible with Brand Optrel Compatible with Manufacturer Model Number 1006.210 1006.300 1006.500 1006.501 1006.502 1006.600 1006.900 1006.901 Compatible with Series Sphere Series Helmet Features Sphere Series Helmet For Use With Crystal 2.0 e650 e670 e684 Optrel Sphere Series Helmets Vegaview 2.5 Includes (1) Potentiometer Knob Black (1) Battery Cover (1) Sensitivity Knob (1) Silicone Grind Cap