Part Number: 4X31K03939 The Lenovo Professional Wireless Rechargeable Combo Keyboard and Mouse is a revolution in productivity and design. Its full-size keyboard sports scissor switches that create an elevated typing experience. Its mouse marvellously crafted from bio-rubber keeps you comfortable all day, and sports an impressive 4,000 DPI range. Plus, both the keyboard and mouse are made from eco-friendly 65% recycled material that protects the environment. Technical Information Brand Lenovo Power Requirement KB:420mAh lithium battery Mouse:380mAh lithium battery Cable Length/Type 1 M / USB A to C Battery Life Up to 3 months Battery Charging Time 2hours for full charge Color Grey Mouse Sensor Optical IR Sensor Mouse Resolution 3-level Adjustable (default at 2400, 1600, 800) ; Levels can be configured via Lenovo Go Central Software up to 4000 Scrolling 4-way scrolling (Up, Down, left, right) Number of Button 8 buttons (Left / Right Click, DPI Button, Forward Button, Backward Button, Power Switch, Multi-Device Switch, Scroll-wheel with middle click and right/left-tilt) Button Life Up to 10 million clicks for left and right buttons Backlight No X-direction Key Pitch 19.05 mm (0.75 in) Y-direction Key Pitch 19.05 mm (0.75 in) Keyboard Key Lifecycle Up to 10 millions clicks Special/Added Features Programmable Keys / Lithium battery / Seamless switch up to 3 devices / Dual mode connections : 2.4G & Bluetooth / Dynamic Wheel / Bio-rubber coated grip Length Mouse: 111.29 mm (4.38 in) KB:437.4 mm (17.22 in) Depth Mouse: 62.23 mm (2.45 in) KB:128.8 mm (5.07 in) Height Mouse: 36.06 mm (1.42 in) KB:14.8 mm (0.58 in) Product Weight KB: 586 g (20.67 oz) MS : 80 g (2.82 oz) Included Accessory Lenovo USB-A Unified Pairing Receiver; USB-A to USB-C charging cable Package Type Brown Box (FSC Certified) Packed Dimensions (L x D x H) 538 x 129 x 42 mm (21.18 x 5.08 x 1.65 in) Packed Weight 885 g (31.22 oz) Connectivity 2.4G & Bluetooth Hardware Requirements Supported PC with USB-A port or Bluetooth Low Energy Minimum Operating Temperature 0 degrees Celsius (32 degrees Fahrenheit) Maximum Operating Temperature 40 degrees Celsius (104 degrees Fahrenheit) Minimum Relative Humidity (%) 20% Maximum Relative Humidity (%) 95% Smart Find Visibility Yes