Purchased on Amazon. I am selling this because it doesn't suit my computer needs. Contents: Trackball mouse body Receiver (located inside the battery box) I have disposed of the product box, so the main unit box is not available. It will be shipped in a different box. Condition: Purchased in July 2025 and used for about a week, but I am selling it because it didn't fit my usage. There are no noticeable scratches or stains. Product Description: Ergonomic design silent trackball mouse, providing comfortable operability. - Connection method: 2.4G wireless - DPI settings: 5 DPI - Weight: Approximately 125.5g - Size: 135.31 x 98.92 x 45.55mm - Accessories: Trackball mouse body, receiver, user manual - Number of clicks: 8 million - Silent type: Yes - Ergonomics: Yes Ewin Trackball Mouse Bluetooth & 2.4GHz Dual Compatible, Connects to 3 Devices Simultaneously, Trackball [NEW Model] Wireless Thumb Silent Type High Precision Ergonomics Instant Connection Wireless Mouse 7 Buttons Forward/Back Buttons