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 or 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 Item:Mini-Keyboard Keys:5 Keys Mode:Bluetooth-compatible Size: 14x6x4.5cm or 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 and silicone Package Contents: 1set x 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.