Features: This mini keyboard with custom functions.Type-C to USB interface, no driver, plug-and-play. New appearance design, more powerful, lower power consumption; A-variety of RGB lighting effects The knob for pause/play-, volume-up, volume down and other functions, good helper for attendance. All keys are programmable, compatible with various design software. Wired model: no built-in battery, various RGB light effects, USB power supply; Bluetooth-compatible model: with built-in battery, RGB light effects can be used when connecting USB cable, and RGB light effects are turned -off in wireless state; Specifications: Item: Mini Keyboard Keys:6 Keys and 1 Knob Material: ABS- Mode:Wired/Bluetooth-compatible Size: approx 120x57.5x38.5mm/4.72x2.26x1.51in Color: Black/White Charge: Type C USB Note: Due to the problems of lighting effects and shooting angles, there will be certain tolerances in the product, please understand. Please allow 0-2mm error due to manual measurment. Package includes: 1 PC x Mini Keyboard