Logitech MK345 Wireless Keyboard + 1000DPI Wireless Mouse1. 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 reliable wireless 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 selection. 7. 2.4GHz wireless connection technology, no delay, 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: Yes.