This  Mouse has been cleaned and tested to be 100% fully functional. This device uses Bluetooth and batteries. Batteries not included. Original packaging is not included.Product Information :

• SEAMLESS MULTI-TOUCH SURFACE – The Multi-Touch area covers the top surface of Magic Mouse, and the mouse itself is the button. Scroll in any direction with one finger, swipe through web pages and photos with two, and click and double-click anywhere. Inside Magic Mouse is a chip that tells it exactly what you want to do. Which means Magic Mouse wont confuse a scroll with a swipe. It even knows when youre just resting your hand on it
• LASER-TRACKING ENGINE – Magic Mouse uses powerful laser tracking thats far more sensitive and responsive on more surfaces than traditional optical tracking. That means it tracks with precision on nearly every surface whether its a table at your favorite cafe or the desk in your home office without the need for a mousepad
• WIRELESS – Magic Mouse connects to your Mac via Bluetooth wireless technology, so theres no wire or separate adapter to worry about. Pair Magic Mouse with your Mac and enjoy a reliable and secure connection up to 33 feet away. When you combine Magic Mouse with the  Wireless Keyboard, you create a workspace free of annoying cables