This mini-keyboard with custom functions.Type-C to USB interface, no driver, plug-and-play. 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 design software. Support type-C and Bluetooth-compatible dual modes Item:Mini-Keyboard Keys:5 Keys Mode:Bluetooth-compatible Size: 14x6x4.5cm/5.51x2.36x1.77in Charge:Type-C USB Note:the color of product accessories is random, and the designation is not accepted. Colour:Black Material:ABS + silicone Package Contents: 1set * 5-button custom Bluetooth silent keyboard Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.