Industry Leading Ergonomic Design Stainless steel material gives heavy duty feeling and the low-profile keys offer quiet and comfortable typing. It allows you to gain quick access to common functions, such as volume level, playback control, brightness, and more. It also provides number pad with slim and compact design. Switch Between 3 Devices with A Single Clicking This keyboard is able to connect to 3 devices at the same time. After you pair the keyboard with 3 devices by long pressing the blue key at the first time, you can simply switch the keyboard to type on any of the device with a single key clicking. Cross Platform Compatible Fully functional to all four major operating system: IOS / Android / Windows, and features system-specific function keys for each operating systems. Any Bluetooth supported devices such as laptop, computer, tablet, smartphone can easily be paired and gained quick access to common functions, such as volume level, playback control, brightness, 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. Keyboard with scissors kick construction can be used more than 3 million times continuously. Rechargeable Battery Built-in industry-high rechargeable Li-polymer battery provides 6-month use on a single charge. (based on 2 hours non-stop use per day)