[Packaging]:Using a PVC plastic packaging box,and placing every switch separately which can better protect the shaft body from damage and prevent pins from bending.Beautifully packaged, suitable as a Christmas gift for mechanical keyboard lovers. [Product parameters]:Linear feel;Operating force:40gf;Rerurn force=15gf;Bottom-out force:50gf;Conduction Travel:1.8±0.4mm;Total travel:3.6±0.3mm;Operating life:80 millions Cycles(min). [Compatibility]:Compatible with 5 pin hot-swapped keyboards and SMD;With good light transmittance,also suitable for RGB LED keyboard. [Feature]: Kailh box V2 series switches provide an paralleled smooth typing experience and a better sense of percussion;Patent technology,contact leaf and plate isolated in a"Box",reduce the oxide foramtion,with gold crosspoint technology to increase durability. [High Quality]:Kailh box V2 series switches with high stability design,Super long life-over 80 million cycles;Support double IP56 Dust&waterproof.