Specification: Material: acrylic Keys: 3, 4 (optional) Knob: 3 keys + 1 knob, No knob in 4 keys Color: black, clear (optional) Current and voltage: DC 5V/1A Interface: Type-C Axle: Outeum red switch Product size: 100x35x30mm-5cm/3.94x1.38x1.18-1.97in Product weight: 58-68 grams Product description: Programmable Keypad: All keys are programmable. All key functions of the standard for Windows keyboard can be set, and a complex combination of shortcut keys can be realized with one key. 3 keys and 1 knobs are programmable: 3 keys, the knob is pressed, clockwise rotation, counterclockwise rotation can be customized. RGB LED colorful lighting mode can also be set to change different lighting effects. Knob function: The knob can set functions such as zoom in and zoom out, previous track, next track, volume up, volume down, pause, play, etc. The one-handed macro mechanical keyboard is easy to operate and easy to carry. (Note: The 4-key keyboard has no volume knob) Mini size, effectively saving desktop space. Detachable USB cable. You can connect a keypad (plug and play) and another keyboard at the same time on the same computer and they won't interfere with each other. Wide range of applications: The is suitable for office, gaming, music, media, industrial control, laboratory, production line testing and other fields, and is a good helper for many other types of users such as designers and video editors. Note: The 4-key keyboard has no volume knob. Due to the different monitor and light effect, the actual color of the item might be slightly different from the color showed on the pictures. Thank you! Please allow 1-2cm measuring deviation due to manual measurement. Included: 1 x Keypad 1 x Data Cable _x005f_x000D_