Features: This mini-keyboard with custom functions.Type-C to USB interface, no driver, plug-and-play. New appearance, 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. Support type-C and Bluetooth-compatible dual modes ; Specifications: Item: Mini- Keyboard Keys:5 Keys Material: ABS- Mode:Bluetooth-compatible Size: approx 14x6x4.5cm/5.51x2.36x1.77in Color: Black/White Charge: Type-C USB Package Includes: 1 Piece Mini- Keyboard 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.