Limited-time summer vacation sale! Thank you for viewing! My mouse broke, and I thought I'd try a trackball mouse, so I bought this one. However, it didn't suit me, and I've only used it for a few hours. The ball glides smoothly, and the texture and appearance are very cool, so I think it's great for those who are used to trackballs. I wish I could have used it. Bluetooth connects immediately, and there's also a USB receiver, so you can use either, and there's no worry about not being able to use it. It's almost new, with no scratches or stains. It comes with the bag, box, and charging cable. Please, someone, use it! Below are the details of this mouse. Bluetooth/USB receiver connection, 4-level DPI adjustable, rechargeable, thumb operation, ergonomic design, 6 buttons, forward/back buttons, wireless mouse, Windows/Mac compatible, red ball 【Wrist-friendly, ergonomic design and thumb operation】 With a trackball mouse, you can operate the cursor without moving your wrist or arm. Reduce muscle strain with smooth movement using your thumb. You can use it comfortably for long periods at a natural angle. 【Precise tracking & 4-level DPI adjustment function】 With a high-precision sensor and smooth trackball, you can achieve stable operation even on beds, sofas, or narrow desks. DPI is adjustable in 4 levels. This is a wireless trackball mouse recommended for precision work and working from home. 【Bluetooth/USB connection, 3-device multi-device support】 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-function 6-button design for comfortable operation】 The Nulea wireless trackball mouse is equipped with 6 high-performance buttons, including "forward" and "back" buttons.