Logitech MK545 Advance silent Wireless Keyboard & Mouse Sets Familiar feel. More Controls (1) Product List Keyboard (with 2 AA batteries) Mouse (with 1 AA battery) Logitech Unifying Uplink Receiver User's Manual (2) Specifications WiFi range (meters): 10 meters Keyboard Spill-resistant design Familiar key shape, silent design Height adjustable: 3 tilt angles (preset angle, 4° and 8) Special keys: music control, programmable palm rest Wear-resistant keystroke imprint 10-key numeric keypad (3) Key types: deep contour Power on/off key Keyboard lock status indicator Power indicator 2 AA batteries (alkaline) Batteries: 36 months (4) Mouse Touch Technology: Smooth Optical Tracking Number of buttons: 3 (left/right, center) Scrolling: Line-by-line Scroll Wheel: Yes, 2D, Optical. Connection/Power: Power On/Off Button 1 AA Battery (Alkaline) Battery: 18 months (4) Customizable Applications (5)Compatibility Windows ® 7, 10, 11 and higher ChromeOS USB port available