Optical 2.0 Red Switches (Bottom case Black color)
Operating Force:45±15gf
Pre Travel:2.0±0.5mm
Total Travel:4.0mm Max
 

Optical 2.0 Brown Switches (Bottom case Black color)
Operating Force:55±15gf
Pre Travel:2.0±0.5mm
Total Travel:4.0mm Max
 

Optical 2.0 Black Switches (Bottom case Black color)
Operating Force:60±15gf
Pre Travel:2.0±0.5mm
Total Travel:4.0mm Max
 

Optical 2.0 Blue Switches (Bottom case Black color)
Operating Force:60±15gf
Pre Travel:2.0±0.5mm
Total Travel:4.0mm Max
 

Optical 2.0 Yellow Switches (Bottom case Black color)
Operating Force:35±15gf
Pre Travel:1.0±0.2mm
Total Travel:3.4mm Max

Note:
Gateron Optical Switches are not compatible with regular mechanical keyboards.
Gateron KS-22 is not to be used to replace KS-15 optical switch.

Optical switch principle:
The infrared optical sensing component uses light-sensing principles to generate different but equivalent resistance to form two states of open circuits and paths, thereby triggering the key signal command. 

Advantages of KS-22:
1. Larger diameter of the stem, more smooth typing feel.
2. Lifetime is longer and can be up to 100 million life circles.
3. The blue switch sounds more clear and melodious.
4: Enlarged light-transmitting opening in KS-22 Optical Switch, Light-emitting and light-receiving installation position accuracy is slightly flexible.  

The difference between KS-15 and KS-22:
1. Except blue switch, all other KS-22 switches are pre-lubed in the factory. 
2. KS-22 switch stem and positioning pole in the bottom housing diameter is larger than KS-15's, and the KS-22 stem is more stable.