Interface 2.4Ghz (USB-A dongle) Sensor High Precision Optical Tracking / 1000 DPI Battery Mouse : 18 months / Keyboard : 36 months Tech Specs Dimensions Mouse Dimensions Height: 4.21 in (107 mm) Width: 2.32 in (59 mm) Depth: 1.04 in (26.5 mm) Weight (including battery): 3.53 oz (100 g) Keyboard Dimensions Height: 5.6 in (143.9 mm) Width: 14.7 in (373.5 mm) Depth: 0.84 in (21.3 mm) Weight (including battery): 19.7 oz (558 g) Nano receiver Height: 0.74 in (18.7 mm) Width: 0.57 in (14.4 mm) Depth: 0.24 in (6.1 mm) Weight: 0.06 oz (1.8 g) Technical Specifications Mouse Sensor Technology: High Precision Optical Tracking Sensor resolution: 1000 DPI Number of Buttons: 3 Scroll Wheel: Yes- Mechanical Scroll Buttons: Middle Button Unifying ready mouse: No Unifying ready receiver: No Battery life Mouse: 18 months Battery type mouse: 1xAA Keyboard Battery life Keyboard: 36 months Battery type keyboard: 2xAAA Wireless operating distance: 33 ft (10 m) 1Wireless range may vary due to environmental and computing condition Wireless technology: Logitech Nano Receiver Warranty Information 1-Year Limited Hardware Warranty Part Number Off-white English : 920-009443 Graphite English : 920-009437 Rose English : 920-011311 Receiver Required : Available USB port Windows® 7, 8, 10 or later ChromeOS Works with Surface In The Box Keyboard x 1 AAA batteries (pre-installed) x 2 Mouse x 1 AA battery (pre-installed) x 1 USB receiver x 1 User documentation x 1