Function: 1. ROUND QUAD KEYS: The Bluetooth mechanical keyboard uses round keys with four axes to ensure that your fingers do not tire easily when typing, even after long hours of use, giving you a softer tapping experience. 2. SEVEN-COLOR RGB LIGHTING: Seven-color RGB lighting to enhance the mood of the game. Pull the switch to adjust the white LED light mode. You can also adjust the volume and brightness of the light by turning the knob. 3. MECHANICAL BLUE SWITCH: Supports connection in three modes (wired, wireless, Bluetooth). Bluetooth 5.0 is easier to connect. Mechanical blue switch, responsive, long press loss is small. Two-color cut mark night with light off normal use. 4. THICK LEATHER FINISH: Selected thickened decorative leather, abrasion and scratch resistant, pleasant to the touch. The perfect combination of retro and practical features, ensuring fun in the game and in the office. 5. 2000MAH LITHIUM BATTERY: Typewriter mechanical keyboard built in 2000mAh lithium battery, low power consumption module for longer battery life. The device automatically goes into hibernation after 2 minutes of inactivity. 6. SYSTEM COMPATIBLE: The blue switch mechanical keyboard is compatible with Android, Windows 10, iOS and OS X phones, tablets or laptops. You can connect it to your desktop computer with a USB cable. Specification: Item Type: Typing Keyboard Material: metal, plastic, electronics Applies to: universal Type: mechanical keyboard Number of keys: 83 keys Interface: TYPE C Whether Support Plug and Play: Support Connection to the computer: Wireless Are there multimedia function keys: yes Shortcut keys: yes Waterproof Function Support: Waterproof Key technology: mechanical axles Backlight function: backlight support Whether to support ergonomics: support Operating current when the backlight is always on: 150MA Operating current when the backlight is off: 8 MA Sleep current in Bluetooth mode: 0.6 MA Key rollover: Wired N key rollover, Bluetooth 6 key rollover Operating voltage: 3.7V Working mode: wired, wireless, Bluetooth Hibernation time: 2 minutes after the device does not automatically enter hibernation, press any key to wake up OS: Compatible with Windows2000 or above and OS X OS, BLE support for WIN8 or above Battery type: Built-in 2000mAh lithium battery (included) How to use: Connect and use Package List: 1 x keyboard 1 x charging cable 2 x replaceable keyboard shaft 1 x key puller 1 x User Manual