bigcheeseNZ 
Better deal than the recent Amazon one. The code is only available to users who followed this deal https://www.ozbargain.com.au/node/882316
Any-surface tracking – now 8K DPI: Use MX Master 3S cordless computer mouse to work on any surface – even glass (1) – with the upgraded 8000 DPI sensor with customisable sensitivity
Introducing quiet clicks: MX Master 3S Bluetooth mouse features Quiet Clicks – offering the same satisfying feel but with 90 percent less click noise (2)
Magspeed scrolling: A computer mouse with remarkable speed, precision, and near silence – MagSpeed scrolling is 90 percent faster (3), 87 percent more precise (4), and ultra quiet
Ergonomic design: Work comfortably with a precision mouse featuring a silhouette crafted for more natural wrist posture and optimally placed thumb controls
Upgraded customisation software: Customise buttons and optimise your workflow with App specific profiles in the improved Logi Options+ (5)
FLOW cross-computer control: Work seamlessly on multiple computers or laptops, and transfer text, images, and files – between Windows and macOS (5)
Multi-device and multi-OS: Connect the comfort mouse with up to 3 devices via Bluetooth or the included Logi Bolt USB receiver (6) on Windows, macOS, Chrome OS or Linux
