Note :USB receiver will be available inside the mouse , below the mouse and can be found by opening the battery cover System Requirements :- Windows Vista, Windows 7, Windows 8, Windows 10, Mac OS X 10.5 or later, Chrome OS, Linux kernel 2.6+, USB port ,Wireless operating distance: Approx. 10m, 1 AA battery, 12-month battery life Advanced 2.4 GHz wireless connectivity (Unifying supported), Scroll Wheel (Y/N): Yes Sensor technology: Advanced Optical Tracking, Sensor Resolution: 1000 Receiver Weight: 1.8 g, Mouse Weight (including battery): 84 g Mouse Dimensions : 55 mm (2.17 in) x 95 mm (3.74 in) x 38.6 mm (1.52 in), 3-year Limited hardware warranty. For further support, contact us at 000800 440 2450 Monday - Friday: 9:30 a.m. - 6:30 p.m