New in box retail these are 150$ https://www.logitechg.com/en-us/products/gaming-mice/pro-x2-superlight-wireless-mouse.910-006628.html?srsltid=AfmBOorObFhcMnjFS5KXIEvtrmdXquFc-Hl_96-t6t-vnSLaf7EaZemQ PHYSICAL SPECIFICATIONS Height: 4.92in (125 mm) Width: 2.50 in (63.5 mm) Depth: 1.57in (40 mm) Weight: 2.12 oz (60 g) Technical Specifications LIGHTSPEED wireless technology LIGHTFORCE Hybrid Switches Onboard memory 1Advanced features require Logitech G HUB No-additive PTFE Feet 5 buttons TRACKING TRACKING: HERO 2 Resolution: 100 – 44,000 DPI 2Advanced features require Max. acceleration: >88 G 3Tested on Logitech G640 Gaming Mouse Pad Max. speed: >888 IPS 4Tested on Logitech G640 Gaming Mouse Pad Zero smoothing/acceleration/filtering RESPONSIVENESS Max Report Rate: 8000Hz (0.125) 5Advanced features require Logitech G HUB Software available for download at logitechg.com/ghub Microprocessor: 32-bit ARM Battery life Constant motion: 95 h Warranty Information 2-Year Limited Hardware Warranty