I've been using this for about a month, but I'm selling it because I don't use it anymore. There are no issues with its operation. I will clean it with alcohol before shipping. The mouse feet have been replaced with EsportsTiger Mouse Feet ICE Mouse Feet for Ninjutso Sora. Product Specifications ＜Physical Specifications＞ Depth: 37.3 mm Grip Width: 59mm Length: 119.2mm Weight: 39g±2g Battery Life: 80 hours ＜Electrical System＞ Switch: Omron Optical Encoder: TTC - 9mm ＜Tracking＞ Sensor: Pixart PAW3395 DPI: 50 - 26000 DPI Max Acceleration: 50G Max Speed: 650IPS LOD: 1/2mm Max Report Rate: 1000Hz (Up to 8000Hz with a separate receiver) ■System Requirements Windows 7 or later USB port Internet (Chrome/Edge) ■Package Contents Sora V2 USB Receiver USB-C Cable Sticker Information Guide