Bluetooth & 2.4G Wireless Connection: Bluetooth 4.0 technology provides stable connection and within 33 feet without any delays. One plug and play 2.4G USB receiver (stored on the bottom of the mouse) or via Bluetooth can connect both the keyboard and mouse without installing additional software or driver, ensures a stable and reliable connection. Switch to 3 Devices: The bluetooth keyboard and mouse combo enabled to support up to 3 devices simultaneously. Just press 2.4G/BT1/BT2 button to fast switch back and forth between the input device. Multi-Device Keyboard and mouse for Mac, iPad, Apple, Android, Windows. Compatible with Mac OS/iOS 10.12 or above, Windows 8/10 or above, Android 4.3 or above. Rechargeable and Energy Saving: Built-in rechargeable 280mAh lithium battery, this keyboard and mouse combo can be easily charged with included type-c charging cable. It is not used for more than 30minutes, will automatically go into sleep mode to save energy and press any key to wake it up. Ultra-thin Metal Appearance: Super thin design, durable aluminum alloy material and dark gray paint fully manifest its graceful appearance. Smooth and low-profile large keys with number pad offer quiet and comfortable typing. Comfortable & Precise Typing: Low profile keys, a scissor mechanism beneath each key allows for increased stability, silent to press and rebound quickly. Three adjustable DPI levels (1000/1600/2400) ensure precise clicking.