Overview

The Buffalo BSTBB700BKX is a wireless trackball mouse built so that cursor movement, scrolling and button presses all happen under your fingertips. Because your wrist and arm stay put, it suits desks with limited depth where sweeping a conventional mouse back and forth is awkward. The graphite black shell keeps a low profile on a work desk.
The centrepiece is a 34mm ball running on artificial ruby bearings, which Buffalo tunes for a light, smooth and quiet roll under the thumb. A metal wheel handles vertical and horizontal scrolling in a single action, and the DPI can be switched between 500, 800 and 1200. Buttons are gathered near the top surface, so the footprint stays compact.
Wireless and Bluetooth connections are both supported, and up to three devices can be paired and swapped with the top-mounted button. That makes it practical for people who move between a laptop, a desktop and a tablet without unplugging anything.

Connectivity & Compatibility

The mouse offers two connection paths, wireless and Bluetooth, with pairing and device switching handled by the button on the upper body. Three registered devices is the ceiling, which covers a typical work-and-home split.
The wheel supports vertical and horizontal input in one motion, useful for spreadsheets and long pages. Note that the tilt (horizontal) direction does not support fast scrolling, so horizontal movement behaves differently from the vertical fast-scroll action.
On a Mac, using the forward and back buttons requires opening keyboard shortcuts in the system settings and clearing the Mission Control checkbox. The wheel direction is also designed to match Windows behaviour even when macOS natural scrolling is left enabled.

Product Info

At roughly the 5,000 yen band, this sits in the mid range for a trackball with multiple buttons, tilt scrolling and multi-device pairing. The 34mm ball, artificial ruby bearings, metal wheel and quiet operation are what separate it from entry-level alternatives.
The body measures about 117 mm long by 95 mm wide and weighs around 127 g, with a rounded arch that keeps overall length short. That shape fits a range of hand sizes and keeps the desk footprint small.

Best Use Cases

  • Office workers on cramped desks who type and click for hours: the thumb-driven ball removes the need to sweep the arm, though players chasing fast aim in shooters should look elsewhere.
  • People juggling several machines between office and home: three-device pairing and a top button mean one mouse covers the whole rotation.
  • Anyone working in a quiet room: the ball and bearing design is tuned to keep operation sound low.

Product Disclosure (Amazon)

  • Model: BSTBB700BKX
  • ASIN: B0HCY834TT
  • Note: This article covers a manufacturer-made product based on Amazon listing details.