Applicable models: for Mx Keys mini, for K860, for Keys keyboard, for mouse, for MX Master3s, for MX Anywhere3, for LIFT VERTICAL, for M650 Note: Not all wireless devices can use the Bolt receiver. Confirm whether your device supports the Bolt link feature: You can usually tell by whether it has the Bolt logo. Use as a spare part or to connect multiple devices. for Bolt USB receiver provides powerful and secure wireless connection technology. When connected to two computers simultaneously, you can use F1ow transfer and compatibility. Bot technology mice allow for easy file transfer between screens. It's normal for the s and m codes to vary depending on the batch. Pairing instructions: Download Options+ from the for official website in Support. After downloading, plug in the receiver, select your receiver model, and follow the prompts. To pair a mouse: Open the pairing software, click Next, then turn the mouse off and on again. To pair a keyboard: Open the pairing software, click Next, then turn the keyboard off and on again. (If your keyboard doesn't have an on/off switch, remove and reinstall the batteries to turn it on.) It's super simple, do it once, and enjoy it forever! (Due to different batches, the product appearance and printed text , which not affect the use) Color: Black Material: plastic Package Contents: 1 * USB Receiver Bolt Adapter 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.