Product Description Razer Naga X Ergonomic MMO Gaming Mouse with 16 buttons 16 programmable buttons 85g midweight ergonomic design 2nd-gen Razer™ Optical Mouse Switch MADE TO RAID Whether you’re a tank, healer or DPS, always be ready to raid with the Razer Naga X—an ergonomic MMO gaming mouse with 16 programmable buttons. Made lighter and armed with other best-in-slot features, it’s time you got geared up to top the logs. 16 PROGRAMMABLE BUTTONS Have a greater arsenal of commands at your fingertips by mapping out essential hotkeys or macros via Razer Synapse 3, and utilize its advanced feature—Razer™ HyperShift—to double your inputs with a secondary button profile that can be toggled at the press of a key. RAZER™ 5G ADVANCED OPTICAL SENSOR Engineered with 99.4% tracking accuracy, the sensor in this MMO gaming mouse also allows for an advanced level of precision as it can be calibrated via Razer Synapse by setting a preset or custom mouse surface profile.