Lenovo Essential Wireless Combo Keyboard & Mouse Gen2 AI - US English Tech Specs General Brand Lenovo Backlight No Connection Type Wireless Mechanical Color Black Dimension Packed Dimensions (L x D x H) 520 x 142 x 42 mm Weight KB: 406.5g (without battery) MS : 65.5g (without battery) Packed Weight 998 g Power KB: 1.5V AAA*1, MC:1.5V AA*1 Others OS Requirements OS Independent Mouse Sensor Optical Sensor Y direction Key Pitch 19.05 mm (0.75 in) Maximum Operating Temperature 40 degrees Celsius (104 degrees Fahrenheit) Minimum Relative Humidity (%) 20% Warranty Type Customer Replaceable Unit (CRU) Warranty Period 3 Years Depth Mouse: 61.5mm KB: 134.5mm Battery Life Up to 15 months battery life for keyboard (may vary based on usage) Up to 18 months battery life for mouse (may vary based on usage) Keyboard Layout 2.5-zone Maximum Relative Humidity (%) 95% Package Type Brown Box Included Accessory Lenovo USB-A Receiver Button Life 3 million clicks for left and right buttons Special/Added Features No Height Mouse: 36.1mm KB:21.9mm Keyboard Key Lifecycle Up to 10 millions clicks Scrolling 2-way scrolling (Up, Down) Mice Button 3 buttones ( Left, Right, Scroll)