Features:brand new and high quality16.8 million RGB Backlight Types:Features RGB lighting with 16.8 million LED colors, rhythm and sound combinations of lighting, with additional key-programming and macro-creation for three definable layers.Customization of 3 Fn Macros:It has more than 6 driver settings. Just download the driver and you can program the backlight and macro settings, FN1 / FN2 / FN3 tri-layer program modes are available for all needs. Built-in flash memory can save the setting in offline mode, never worry about losing it.OEM PBT Keycaps:For this numpad, we go with the high quality PBT keycaps with the OEM profile. it is much more durable, oil resistant,and stays true to color longer. Glossy captions perfectly show the keyboard when using in dark circumstances.Superior Hardware Architecture:In order to maximize the full functionality of the sk21 functionality, we have integrated a 32-bit M3 MCU chipset with built-in 8M Flash memory and 3-channel 256 professional level RGB color management chip. Your keyboard programming and macro customizations will be seamless, and you can be sure of a smooth user experience.Superior Hardware Architecture:In order to maximize the full functionality of the sk21 functionality, we have integrated a 32-bit M3 MCU chipset with built-in 8M Flash memory and 3-channel 256 professional level RGB color management chip. Your keyboard programming and macro customizations will be seamless, and you can be sure of a smooth user experience.Gateron black, green, tea, red, yellow.With five different for touch feels, there is for always one that fits your needs, and the Gateron high quality switch delivers unmatched durability and for key feedback.21 Keys Functional Numpad: Designed with a 21-key and 32-bit MCU, this numpad has the space and processing power to handle your most demanding tasks. Fully programmable, it's the perfect choice for gamers, programmers, and professionals looking to streamline their workflows. Specifications:Keys Number: 21Material: PBTInterface Type: USB Type CSize: approx. 123x83mm/4.84x3.28inGateron switch : black, green, tea, red, yellow Note:No retail package.Please allow 0-1cm error due to manual measurement. pls make sure you do not mind before you bid.Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you Package includes:1PC x Numeric Keypad