A cheaper alternative to buying many separate keys. This unit can be switched to any Percentage (2% increments - 70%/98%)

Percentage Key Settings

%	SW1	SW2	SW3	SW4
70%	ON	OFF	OFF	OFF
72%	OFF	ON	OFF	OFF
74%	ON	ON	OFF	OFF
76%	OFF	OFF	ON	OFF
78%	ON	OFF	ON	OFF
80%	OFF	ON	ON	OFF
82%	ON	ON	ON	OFF
84%	OFF	OFF	OFF	ON
86%	ON	OFF	OFF	ON
88%	OFF	ON	OFF	ON
90%	ON	ON	OFF	ON
92%	OFF	OFF	ON	ON
94%	ON	OFF	ON	ON
96%	OFF	ON	ON	ON
98%	ON	ON	ON	ON