The classic and elegant style, combining the unique round key cap, brings you different using experience The keyboard uses button noise reduction technology to greatly reduce the key click sound, it can provide quiet and comfortable typing Automatically turn on the power-saving mode to enter the sleep state, since no response for 15 minutes, intelligent power saving Bluetooth 3.0 technology provides a stable and interference-free connection with a working distance of 10m Enables to switch between Windows, iOS, and Android operating system compatibility modes, allowing you to use various shortcut functions Compatible with Windows 2000/XP/ME/VISTA/7/8/10 Specifications: Brand: Ajazz Model: 308i Key Number: 84 keys Bluetooth Version: 3.0 Battery: 2 x AAA batteries (batteries not incldued) System Requirement: for Mac, iOS, Windows, Android Switch Life: 10 million times Product Size: 320 x 137 x 30.5mm Package included: 1 x AJAZZ 308I Wireless Bluetooth Keyboard Retro Round Keycap 84-Key Keyboard 1 x English and Chinese Manual Other items not incldued Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Sold by-YJL official store