Amazon.co.jp: Logitech Ergo M575 New Version Wireless Trackball Mouse, Easy Thumb Control, Precision and Smooth Tracking, Ergonomic Comfort Design, Windows/Mac, Bluetooth, USB - Graphite Extra Battery Bundle : Home & Kitchen
Hands-on with the new $50 Logitech Ergo M575 Wireless Trackball - CNET
Logitech ERGO M575 Wireless Trackball with Smooth Tracking
Logitech Ergo M575 Wireless Trackball - The better mouse?
Amazon.com: Logitech Ergo M575 Wireless Trackball Mouse - Easy Thumb Control, Precision and Smooth Tracking, Ergonomic Comfort Design, for Windows, PC and Mac with Bluetooth and USB Capabilities (Black) : Electronics
Logitech's new $50 ergonomic trackball mouse has Bluetooth LE support