LENOVO Professional Wireless Combo Keyboard & Mouse (US English) Keyboard Layout 3 zone layout Keycap Amount US English Color Black Battery Life Up to 24 months Connection Type 2.4 GHz Wireless via Nano USB Weight Mouse - 80 g (0.18 lbs), Keyboard - 700 g (1.54 lbs) Mice Button 3 (left click, right click, scroll click) DPI 1600 DPI Mouse Sensor Invisible Laser Hardware Requirements Supported PC with USB port Warranty Type Customer Replaceable Unit (CRU) Power Requirement Mouse - 2 AA batteries, Keyboard - 2 AA batteries Scrolling Scroll wheel (up/down/left/right) Brand Lenovo OS Requirements Windows 7, Windows, 8, Windows 8.1, Windows 10 Agency Approvals ANATEL, BSMI, CB, CE, CITC, CNC, COFETEL, CTUVus, EAC, FCC, IC, ICASA, IDA, IFETEL, KCC, MIC, NCC, NTC, RCM, SRRC, SUBTEL, TRA, TUV Mark, VCCI Package Type Brown box Height Mouse - 34 mm (1.33 in), Keyboard - 20 mm (0.80 in) Length Mouse - 64 mm (2.52 in), Keyboard - 450 mm (17.71 in) Depth Mouse - 113 mm (4.45 in), Keyboard - 164 mm (6.46 in) Special/Added Features Island style keys Warranty Period 2 Years Maximum Operating Temperature 40 degrees Celsius (104 degrees Fahrenheit) Minimum Operating Temperature 0 degrees Celsius (32 degrees Fahrenheit) Maximum Relative Humidity (%) 95% Minimum Relative Humidity (%) 20% Shipment Group Lenovo Professional Wireless Laser Mouse; Lenovo Professional Wireless Keyboard; 1 Nano USB receiver; 4 AA batteries; Set-up and information poster Height (US) 0.79in Width (US) 6.46in Depth (US) 17.71in Weight (US) 1.54 lbs Height 20mm Width 164mm Depth 450mm Weight 0.7kg Min Operating Humidity 20% Max Operating Humidity 95% Min Operating Temperature 0C Max Operating Temperature 40C Warranty Types Customer Carry-in or Mail-in Rapid Replacement Service Warranty Period Two Year