Wireless Bluetooth connection, compatible with Windows, Android, and iOS devices. If the desktop does not have Bluetooth, a Bluetooth receiver can be used. The laser projection keyboard has no physical keys and connects to the main device via Bluetooth. It is compact, portable, and suitable for most working environments. Color: silver Material: plastic Package Contents: 1 * Keyboard 1 * USB cable 1 * User manual in Chinese and English The package includes only the items listed above; other products are not included. Note: Due to light reflection and differences in display screens, the color of the item in the image may vary slightly from the actual product. Measurement error allowance is +/- 1-3 cm.