Tested and 100% working.  Razer carrying case is included.

Get ready for the ultimate gaming experience with the Razer Basilisk Ultimate Wireless Optical Gaming Mouse in sleek black, complete with Chroma RGB lighting. This gaming mouse boasts a maximum DPI of 20000, making it perfect for even the most intense gaming sessions. With 11 programmable buttons, including a thumb button and adjustable DPI, you can customize your gaming experience to your liking. The grip is designed for comfort, ensuring you can play for hours without any discomfort. The mouse is wireless and can connect via Bluetooth, giving you the freedom to move around while playing.