【Wireless Connection】 Wireless connection using a USB receiver eliminates the hassle of cables, allowing for smooth operation. Bluetooth connection is also possible. 【High-Precision Tracking】 Using a trackball saves desk space while enabling high-precision operation. - Model Name: M575S - Brand: logicool - Type: Wireless Trackball - Accessories: USB receiver - Color: Black - Features: Ergonomic design ◾️Purchased on Amazon. I've used it for about a month, but it doesn't suit my needs, so I'm selling it. It's in good condition because it hasn't been used much. Operation has been confirmed. Connection Method: Bluetooth + Unifying USB Receiver