ELECOM Wired / Wireless / Bluetooth Finger-Operated Trackball Mouse, Compatib.... Product Features OPTICAL TRACKING TECHNOLOGYThe ELEOM "DEFT PRO" trackball provides precise cursor movement for superior accuracy so you can get where you want on the screen quickly with less hand movement, improving productivity and efficiency. FUNCTIONAL 8 BUTTONSYou can assign favorite function to each button by using "ELECOM Mouse Assistant" ELECOM Mouse Assistant Software will be available to download from ELECOM NET website. DPI CURSORDesigned with a high-performance gaming optics system sensor and lens. The DPI button can easily change between 500, 1000 and 1500 DPI, making the movements of your cursor faster or slower. EASY MAINTENANCEThe ball rolls on three 2.5 mm large artificial ruby ball bearings. They are extremely smooth and the relatively large size prevents dust and dirt from clogging them. So you dont have to clean the ball bearings too often. The ball is held in place by the ball bearings, but can easily be popped out of the device, by pushing it through the hole in the bottom and it can be easily cleaned. PRODUCT DETAILSSystem requirements: Windows 7, Windows 8.1, Windows RT8.1, Windows 10 or later (Horizontal scrolling function is not working in Windows RT8.1), macOS 10.13 or later, Size: W3.6"(91.4mm) X L5.3"(133.4mm) X H2.3"(57.3mm), Weight: 5.7oz(without battery), DPI: 500/1000/1500 count (switchable), Connectivity: wired / wireless / bluetooth, 1 X AA battery(Included)- Battery Remaining Light Lamp equipped. Product Specifications Brand: ?ELECOM Item model number: ?M-DPT1MRXBK Hardware Platform: ?Laptop, PC Operating System: ?Windows 10 Item Weight: ?5.8 ounces Product Dimensions: ?5.25 x 3.6 x 2.26 inches Item Dimensions LxWxH: ?5.25 x 3.6 x 2.26 inches Color: ?Wireless/Wired/Bluetooth Power Source: ?Battery, Corded Batteries: ?1 AA batteries required. (included) Manufacturer: ?Elecom Japan (PC) Country of Origin: ?China Is Discontinued By Manufacturer: ?No Date First Available: ?May 1, 2018