Features: This mini-keyboard with custom functions.Type-C to USB interface, no driver, plug-and-play. New appearance, more powerful, lower power consumption; 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 The buttons are made of silicone and are silent. Specifications: Item: Mini- Keyboard Keys:3 Keys Mode: Bluetooth and Type-C color: Black Material: acrylic + silicone Package Contents: 1 x Mini Keyboard 1 x USB cable 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.