Thank you for viewing. I bought a trackball mouse because I wanted to try using one, but it didn't suit me, so I only used it for a few hours. The ball glides smoothly, and the texture and appearance are very cool, so I think it's good for those who are used to trackballs. Bluetooth connects immediately, and there's also a USB receiver, so you can use either. It's almost new, and there are no scratches or stains as I only opened it to try it out. The box and accessories are also included. Shipping is planned via Yu-packet Plus. ◾️Product Information◾️ Bluetooth/USB receiver connection, 4-step DPI adjustment, rechargeable, thumb operation, ergonomic design, 6 buttons, forward/back buttons, mouse, wireless, Windows/Mac compatible, red ball 【Easy on the wrist, ergonomic design and thumb operation】 With a trackball mouse, you can operate the cursor without moving your wrist or arm. Reduces muscle strain with smooth movement using your thumb. At a natural angle, you can use it comfortably for long periods of time. 【Precise tracking & 4-step DPI adjustment function】 With a high-precision sensor and smooth trackball, you can achieve stable operation even on a bed, sofa, or a narrow desk. DPI can be adjusted in 4 steps. Recommended for precision work and working from home. 【Bluetooth/USB connection, supports 3 multi-devices】 A mouse that can connect to up to 3 devices. Easily switch between Bluetooth or USB receiver. Compatible with both Windows/Mac, making device management for work and hobbies smoother. The 2.4G USB receiver is stored at the bottom of the wireless mouse. 【Rechargeable battery, long-lasting & economical】 The Nulea bluetooth mouse does not require batteries. The large-capacity built-in battery allows for months of long-term use. Easily charge with a USB cable. Experience the freedom of wireless anytime, anywhere. 【Multi-functional 6-button design for comfortable operation】 The Nulea wireless trackball mouse is equipped with 6 high-performance buttons, including "forward" and "back" buttons.