【product features】 ◆ left and right buttons with up to 50 million times the optical micro-switches， can reach zero wear · aging · Zero latency point super-resistant and many other advantages. ◆ roller ring with up to 10 million light switch hand wheel， can be reached zero wear · aging · Zero delay super-resistant roll and many other advantages. ◆ Left-click on the three kinds of modes， rapid increase in firepower， superior firepower absolute configuration， so that rival admiration! ◆ exclusive research and innovation rank 16 [micro precision calibration] technology， fine-tune the focal length of the optical engine， make the image clearer， more accurate positioning， enhance ability to adapt to various surfaces of the optical engine. ◆ 8 Ge programmable buttons design， in response left three guns FPS games feature uses the MMO / RPG game macros， a key release! ◆ original use [sensitive Golden Boot] special super-smooth metal no wear pads， wear and low coefficient of friction， and compare past glial mat smoothness can improve more than 20%!