High quality and new design ensures durability and reliability for long-term use. Convenient, reliable connection with 2.4 GHz wireless technology for seamless performance. Allows connection of up to six compatible mice and keyboards to one receiver for enhanced productivity. Download Unifying software to quickly add all of your devices to one receiver for easy management. Compatible with K800, K750, K710, K700, K520, K400, K360, K350, K340, and all devices with Unifying logo for versatile use. This wireless receiver is designed to provide a hassle-free connection for your devices. With the ability to connect multiple devices, it simplifies your workspace and reduces clutter. you have the Unifying software downloaded to easily pair your devices. Please note that this receiver is only compatible with products that feature the Unifying logo and is not suitable for 3.0 USB ports. Color: Black Material: plastic Package Contents: 1*USB Dongle Receiver 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.