Kensington Expert Wireless Trackball Mouse (K72359WW) Black, 3.5" x 6.1" x 8" & Orbit Wireless Trackball with Scroll Ring - Black-Red (K70990WW),

Kensington Expert Wireless Trackball Mouse (K72359WW) Black, 3.5" x 6.1" x 8"The Expert Mouse Wireless Trackball gives you the freedom to be hyper-productive without being limited by a USB cable. The trackball can be paired through Bluetooth 4. 0 LE to save a valuable USB port, or connected via USB Nano receiver. KensingtonWorks software offers incredible customization, and optical tracking technology offers smooth, precise cursor control. Plus, our award-winning Scroll Ring lets you quickly scan up and down web pages or long documents. Add it all up and you get exceptional comfort and ease-of-use from the brand that has set the industry standard in trackballs for more than 20 years.Kensington Orbit Wireless Trackball with Scroll Ring - Black-Red (K70990WW),The Kensington trackball legacy continues with the latest addition to the patented Orbit Trackball with Scroll Ring — the Orbit Wireless Trackball with Scroll Ring. You asked for wireless, and we delivered, with the same great features that have made the Orbit Trackball with Scroll Ring so popular, including a patented scroll ring that allows you to scroll up and down pages with ease; customizable buttons; dual wireless connectivity offering the flexibility of 2.4 GHz and Bluetooth (3.0 and LE), with 128-bit AES government-grade encryption security; four DPI settings (400, 800, 1,200, or 1,600) that let you easily adjust the cursor speed to fit your needs; a detachable wrist rest; ambidextrous design; and plug-and-play ease for Mac or PC.

• Product 1: Large 55mm ball design and Diamond Eye optical tracking for precise cursor control; Patented scroll ring lets you scan up and down pages with ease
• Product 1: Detachable, ergonomic wrist rest supports hand and wrist for improved comfort; Ambidextrous design
• Product 1: Customizable 4-button design, scroll speed and cursor speed via KensingtonWorks software
• Product 1: Connects wirelessly via built-in Bluetooth 4. 0LE or with the USB dongle using 2. 4Ghz wireless; Auto-sleep helps conserve battery life
• Product 2: Dual wireless connectivity offers the flexibility of 2.4 GHz and Bluetooth (3.0 and LE), with 128-bit AES government-grade encryption security
• Product 2: The scroll ring lets you spin the dial to move up and down web pages or documents with complete ease. And the 40mm ball’s hard surface is specially designed as a perfect sphere for precise tracking and control
• Product 2: Four DPI settings let you easily adjust the cursor speed to fit your needs by selecting the appropriate level (400, 800, 1,200, or 1,600) — lower DPI for precision editing, and higher DPI for word processing or casual browsing
• Product 2: Ambidextrous design works equally well for right-handed and left-handed users. Trackball reduces wrist and hand movement to ease repetitive-stress injuries