System requirement • Windows XP, Vista, 7, 8, 10 • USB Port • For driver download or update, please visit Perixx DOWNLOAD website. Specification • Dimension: 130x107x45 mm • Approximate Weight: 134 g (Batteries are not included) • Sensor: Laser • Trackball Size: 34 mm • DPI: 1000/1600/2000 dpi • Silent Click: Yes • Battery: Two AAA Battery. (Batteries are not included in package) • Number of Buttons: 7 • Number of Programmable Buttons: 5 • Scroll wheel with middle click: Yes. • Wireless operating distance: 10 m (33 feet) • Wireless technology: 2.4GHz, with Nano receiver