Industry Leading Ergonomic Design Stainless steel material gives heavy duty feeling and the low-profile keys offer quiet and comfortable typing. Ergonomic mouse reduce the stress with comfortable use. The mouse DPI switch allows you to change the speed of moving cursor between 800 / 1200 / 1600 / 2000 / 2400 DPI. Easy Setup and Use Just simply insert the nano USB receiver (stored in the back of the mouse) into your computer like desktop or laptop, then the keyboard and the mouse can be used instantly. No need driver. The Keyboard and mouse will work up to 33 feet or 10 meters. It allows you to gain quick access to common functions, such as volume level, playback control, copy paste text, and more. Comfortable, quiet typing The whisper-quiet, low-profile keys bring a whole new level of comfort to your fingertips. What's more, keep all your most-used functions and media controls closer than ever Windows-dedicated hot keys. The construction of this scissors-kick keys can be used more than 3 million times continuously. Productive Side Buttons and Switch Button The mouse has side buttons which allow you to control page forward and backward for more productive work and the switch button allows you to switch different task in Windows. Rechargeable Battery Built-in industry-high rechargeable Li-polymer battery provides 6-month for the keyboard and 4-months for the mouse use on a single charge. (based on 2 hours' non-stop use per day)