Logitech MK345 Wiress Keyboard + 1000DPI Wiress Mouse 1. Waterproof splash design, liquid will flow out of the keyboard, no need to worry about accidental splash damage to your keyboard. 2. High-efficiency full-size keyboard, F1-F12 is fully enhanced, supports volume and media control, silent control, switches the next song, pauses the video. 3. Large palm rest, low-key and quiet keystrokes for a comfortable typing experience 4. The Nano receiver provides a riable wiress connection. Store it in your mouse when not in use. 5. The mouse is designed with a hand-corrugated handle for comfortable grip. 6. Optical sensor for comfortable operation, precise tracking and convenient text section. 7. 2.4GHz wiress connection technology, no , no loss of signal. 8. Keyboard battery life of 48 months, mouse battery life of 18 months, energy efficient design, avoid the trouble of frequent battery replacement. Parameter: 1. Keyboard size: 187mm high, 441mm wide, 21mm thick. 2. Mouse size: height 68mm, width 106mm, thickness 38mm. 3. Keyboard: 2 AAA batteries (not included). 4. Mouse: 1 AA battery (not included). 5. Resolution: 1000dpi. 6. Battery life: 18 months for the mouse and 48 months for the keyboard. 7. Working mode: Optical mouse. 8. Number of buttons: 2 for the mouse and 104 for the keyboard. 9. Receiver type: Nano. 10. Is there a power switch: .