Nakabayashi Digio2 Wireless Mouse with Trackball, 5-Button Optical, Black, Z8645

●Dimensions/Weight: W100 x D135 x H47mm / Approx. 115g (Receiver and battery not included) ●Compatible OS: Windows 10, 8.1, 8 / MacOS X (10.8 or later) (Forward and Back buttons not supported), ChromeOS ●Compatible Devices: Computers with a functioning USB port ●Resolution: Switchable between 600/800/1000dpi ●Radio Frequency: 2.4GHz band ●Communication Range: Approx. 6-8m radius (varies depending on usage environment) ●Power Source: 1 AA battery (inside the device) ●Battery Life: Approx. 392 hours of continuous operation, Approx. 614 days between battery changes ●Buttons: 5 buttons (4 buttons + wheel button) ●Connector Type: USB (A) connector ●Accessories: 1 AA alkaline battery (for trial use), Small micro receiver (storable in the device) (W18 x D15 x H5mm / Approx. 2g) Natural, easy-to-use design The design fits comfortably in the hand, making it easy to use even for first-time users. It allows for comfortable operation for long periods of time. Three-level pointer speed adjustment with a light indicator. Each time you press the DPI button, the pointer speed changes and the LED flashes. Easy web browsing. The device comes with "forward" and "back" buttons for convenient internet browsing. High-performance optical sensor. Accurately captures ball movement while reducing power consumption and extending battery life. Long-lasting battery life/power-saving sensor and circuitry. The power-saving sensor and circuitry mean no battery changes are required for approximately 20 months. *Theoretical value based on our measurements.