- Experience next-level comfort and productivity with the powerful MK850 Performance - You’ll conquer work in comfort thanks to the cushioned palm rest, curved keyframe and contoured mouse Technical Specifications Keyboard - Connection Type: Bluetooth Smart and 2.4GHz wireless connection - Wireless range: 10 m - Wireless encryption: Yes - Battery Details: 2 x AAA - Battery: 36 months Mouse - Connection Type: Bluetooth Smart and 2.4GHz wireless connection - Wireless range: 10 m - Battery Details: 1 x AA - Battery: 18 months - Sensor Technology: Logitech Advanced Optical Tracking - Sensor resolution: 1000 DPI - Scroll Wheel: Hyper-fast - Number of Buttons: 8 - Logi Options+ Software support In the Box - Wireless keyboard - Wireless mouse - Unifying receiver - 2 AAA in keyboard, 1 AA battery in mouse (pre-installed) - User documentation