Description: Connect method: Bluetooth2.4G KeyboardDimensions: 14.4*4.68*0.23inch KeyboardItem weight:500g After packaging weight:691g Charge time: about 2hours Keys life: 3milion clicks Specifications: Bluetooth & 2.4G Wireless Connection: 2.4G Wireless technology provides stable connection and within 33 feet without any delays. One plug and play 2.4G USB receiver or via Bluetooth can connect both the keyboard without installing additional software or driver, ensures a stable and reliable connection. Function Across Three Devices - Both keyboard are dual-mode designed and three channels enabled(Bluetooth channel *2 + 2.4GHz USB channel *1). Effortlessly realize quick and smooth switch between 3 devices by pressing FN+2.4G/BT1/BT2 button Broad Compatibility:Widely Compatible with Android, Windows, iOS, and Mac OS systems. Windows 8/ 10 or above; Android 5.0 or above; Mac OS 10.10 or above; iOS 10.13.4 or above; BT 3.2 version or above.Tips: Multimedia keys may not be available on some systems. Rechargeable and Energy Saving: Built-in rechargeable 280mAh lithium battery, this keyboard and mouse combo can be easily charged with includedmicrocharging 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. Comfortable & Precise Typing: Low profile keys, a scissor mechanism beneath each key allows for increased stability, silent to press and rebound quickly. Package Included: 1*keyboard