Model Name: GENIUS Ergo 8250S

Specification :

• RF Frequency: 2.4 GHz
• Sensor Engine: Optical
• Resolution (DPI): 800 / 1200(Default) / 1600
• Number of Buttons: 6 (Left, right, middle button with scroll, forward, backward)
• Silent: Yes
• Ergonomic: Yes
• Weight: Approx. 97 g (included receiver)
• Dimensions (W x H x D): 78.3 x 111.2 x 73.8 mm
• System Requirements: Windows® 8, 10, 11 or later / Mac OS X 10.8 or later / Available USB port