Typewriter Keyboard 83 Keys Vintage Wireless Bluetooth Mechanical Keyboard with Metal Round Cap Black Item Type: Typewriter Keyboard Material: Metal, Plastic, Electronics Applicable: Universal Type: Mechanical Keyboard Number Of Keys: 83 Keys Interface: TYPE C Whether To Support Plug And Play: Support Connection With The Computer: Wireless Whether There Are Multimedia Function Keys: Yes Shortcut Keys: Yes Waterproof Function Support: Waterproof Key Technology: Mechanical Axes Backlight Function: Support Backlight Whether To Support Ergonomics: Support Operating Current When The Backlight Is Always On: 150 MA Operating Current When The Backlight Is Turned Off: 8 MA Bluetooth Mode Sleep Current: 0.6 MA Key Rollover: Wired N Key Rollover, Bluetooth 6 Key Rollover Operating Voltage: 3.7V Operating Mode: Wired, Wireless, Bluetooth Hibernation Time: 2 Minutes After The Device Does Not Operate Automatically Into The Hibernation State, Press Any Key To Wake Up Operating System: Compatible With For Windows2000 Or Above And For OS X Operating System, BLE Support For WIN8 Or Above System Battery Type: Built In 2000mAh Lithium Battery (Included)