The HP Ultra-Fast-Scroll Wireless Mouse 785M (HP part B8YX4AA) is a sculpted, right-handed productivity mouse for people who work through long spreadsheets, timelines, code and documents. Its main scroll wheel is designed for ultra-fast scrolling, and a dedicated horizontal scroll wheel on the thumb side makes moving across wide spreadsheets and editing timelines easier. Programmable buttons can be assigned shortcuts, including quick access to AI assistants, using the free HP Accessory Center software on Windows or macOS. It connects wirelessly through dual-mode connectivity, either Bluetooth or a USB receiver, and is multi-device, so it can switch between computers. The mouse has an internal rechargeable battery charged through a USB-C port, with quick charging, and silent clicks for quiet offices. HP lists dimensions of 123.9 x 99.7 x 45.3 mm and a weight of 123 g, and it is finished in black using at least 60% post-consumer recycled plastic, shipped in FSC-certified packaging. It supports Windows 10 and 11, macOS, ChromeOS, Android and iOS. It suits office workers, analysts, designers and developers who want a larger, more ergonomic mouse than a basic travel model.