Feature: 1. Flexible Connectivity: This keyboard supports both wired USB and wireless Bluetooth dual mode connection, plug and play or quick Bluetooth pairing for desktops, laptops, or tablets. Built in 230mAh lithium ion battery, without the hassle of frequent recharging. It is also compatible with various operating systems, allowing seamless switching between devices for convenient connectivity. 2. Multi Functional Macro Programming: The powerful macro definition feature allows users to customize complex keyboard and mouse combinations, including but not limited to quick copy pasting, launching applications, and controlling multimedia. You can easily record and edit a series of actions, even incorporating delay settings to meet the customization needs of professional users. 3. Triple Key Layer Design: The multifunctional S key allows for easy switching between 3 different key layers, with each layer independently configurable for various functions, enabling up to nine different operations on a limited number of physical keys. This clever design offers extensive functionality in a compact layout, making it ideal for space constrained work environments. 4. Personalized RGB Lighting Effects: The built in RGB backlight system features multiple color modes and dynamic effects, allowing adjustment to create a unique personal style, whether you prefer warm tones or cool neon flashing. Additionally, specific key lighting reminders can enhance operational clarity and efficiency through simple settings. 5. Blue Switch Mechanical Feel: Equipped with blue switch, each keystroke delivers a crisp tactile feedback with moderate resistant, enhancing typing comfort while reducing hand fatigue during extended use. This makes it an ideal choice for users seeking an efficient working and gaming experience. Specification: Item Type: 4 Key Keypad Mechanical Gaming Keyboard Material: ABS Connection: Dual Mode Wireless Bluetooth, Wired USB Switch Type: Blue Mechanical Switch Lighting: RGB Battery Type: Built in 230mAh Lithium Ion Battery Compatible Devices: Universal for Computers Keyboard Mouse Functions: Any Single Key, Combination Key Of Keyboard Or Mouse, Mouse Cursor, Wheel Actions String Functions: Continuous Output Of Letters Or Symbols, Up To 38 Characters Multimedia Functions: Common Multimedia Functions Such As Volume Up Down, Play Pause, My Computer, Etc. Macro Definition Functions: Set Keyboard, Mouse Combination Actions, With Added Delays. Use Recording Function To Record Keyboard, Mouse Actions Multifunctional S Key Explanation: Single Click To Switch Key Value Layer, With 3 Key Value Layers In Total. Each Key Value Layer Can Be Set With Different Functions, Allowing 3 Keys To Have 9 Key Functions Customization (Red Light Indicates The First Layer, Green Light Indicates The Second Layer, Blue Light Indicates The Third Layer). Package List: 1 x 4 Key Keypad Mechanical Gaming Keyboard 1 x Data Cable 1 x Manual