2019 Upgrade Wireless Optical Pocket Pen Mouse with Stylus Function, Promi 2.4G USB Digital Optical Pen Mouse, Adjustable 800/1200/1600 DPI Ergonomic Mice
Ultra portable: 5.7 x 0.6 x 1 inches
DPI adjustable: 800/1200/1600 DPI adjustable, that helps in finding a proper speed.
Natural grip: Ergonomically designed to get rid of the uncomfortable feeling of long-term use of traditional mouse
In working condition (tested)
Includes user manual
Note: 2020 model is on sale on Amazon for $9.79