2.4GHz Wireless Dropout-Free Connection Plug and play, 2.4GHz signal delivers up to a range of 33 feet connection that allows you to work with your PC from a distance. One small Nano receiver (USB 2.0) connects your wireless keyboard mouse combo, high speed rate of return allows the keyboard combo to ensure their stable and smooth transmission without delay and frame skip, hence to enhance your typing experience. (The keyboard or mouse can also be used separately). Retro Floating 104 Round Keycaps The typewriter keyboard wireless and mouse combo with High Profile loud 104 Retro Round keycaps can release your wrist pressure, typing smoothly, gives you the most comfortable typing experience. All circle buttons can be disassembled, put in water to clean. The 104 keys full size colorful wireless keyboard and mouse are perfect for expressing your unique personality.