Features: Razer HyperSpeed Wireless Technology 25% faster than other wireless technology, provides high-speed transmission, lowest click latency, stable and fast response. FOCUS+ Optical Sensor It has 20000DPI with 99.6% resolution accuracy, ensuring that even the most subtle movement from this mouse is tracked with consistency. Asymmetric Abort Technique When the mouse is lifted, a certain working height can be reserved to prevent the tail angle from changing rapidly and the sensor from slowing down. Optical Mouse Switch The optical mouse switch is optimized and adjusted to achieve zero error execution, no springback delay is about three times faster than traditional mechanical fretting. Ergonomic Design Enjoy faster and smoother control with the 78g wireless gaming mouse, fit the palm, not easy to fatigue. 8 Programmable Buttons Fully configurable via Razer Synapse 3, the 8 programmable buttons let you access macros and secondary functions so you can execute extended moves with ease. Specification: Brand: Razer Model: Viper Ultimate Sensor: FOCUS+ (PAW3399) optical sensor, 20000DPI IPS: 650inch/s Acceleration: 50G Wireless connection: HyperSpeed Cable length: 1.8m Item size: 12.7 * 6.6 * 3.8cm /5 * 2.6 * 1.5in Item weight: Approx. 74g /2.61oz Packing list: 1 * Mouse 1 * Charging cable 1 * User manual