[3 Modes for Versatile Use] The mouse comes with 3 different modes, BT5.0/2.4Ghz/USB-C, allowing you to use it wirelessly or with a cable. [9 kinds of colourful light effects] Support multiple light effects switching, adjustable brightness and turn off the light. All-key interchangeable shafts and exquisite keycaps. Product model:K21 mechanical keypad Number of keys:21 keys Keycap material:PBT thermal sublimation Connection mode:Bluetooth/2.4G Wireless/Wired Product size:82.9 x 121 x 36.4mm Type:A:Glimmer Colour:As Shown Material:ABS Package Contents: 1 * 21-key mini keyboard 1 * Data 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. Product Notes: Please allow a little manual errors.Due to the lighting of the photos and the difference of monitors, the pictures may not reflect the actual color of the real item. Please confirm acceptance before ordering. About Shipping: Please ensure your shipping informations are correct to avoid delivery issues. All orders are shipped within 3 days after payment. Delivery usually takes 8–12 days, The specific delivery time is depend on circumstances. If you have any questions during your purchase, feel free to contact us. We will respond you within 24 hours.