The Creative Sound BlasterX team designed and built the Siege M04 from the ground up after spending many years researching the habits of gamers from all over the world. Internally, the Siege M04 has at its core the renowned PWM 3360 sensor which is supported by a fast 32bit MCU. It features an ergonomically designed shape suitable for palm grips, on-board memory, 7 programmable buttons including a sniper button/dpi toggle, and a fingerprint resistant surface with textured rubber grips at the sides. As it is 2017, this premium mouse also features Creative’s Aurora Reactive (as seen on the Creative Sound BlasterX Katana) lighting that has 6 different lighting effects, and a total of 7 points where the RGB LED lighting can be customised. Link