Features:
HyperPolling technology surpasses the industry standard with a true 8000Hz polling rate-sending up to 8 times more data in a second and reducing delay from 1 to 1/8th of a millisecond. 
Adopt second Optical Switch, not only can withstand up to 70 million clicks, but also ensures quick and neat trigger, so you don't have to worry about accidental click triggers.
+ optical has 20000DPI sensitivity and 99.6% tracking accuracy, ensuring that even the most subtle movement from this is tracked with consistency.
71g lightweight design ensures faster and smoother operation, stable structure, suitable for left and right hands.
SPEEDFLEX Cable is designed to produce minimal resistance, you'll be able to perform quicker, smoother swipes for tighter control. 

Specification:
Brand:  
Model: Viper 8KHz
: + optical (PAW3399), 20000DPI
Polling rate: 8000Hz
Tracking speed: 650 inch/s
Acceleration: 50G
Number of programmable keys: 8
Item size: 12.7 * 5.8 * 3.8cm /5 * 2.28 * 1.5in
Item weight: Approx. 71g /2.5oz

Packing list:
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