Welcome to our store！</br> 1、Wireless: 2.4GHz wireless transmission technology, strong performance and stability, 10 meters wireless transmission distance. 2、Three Kinds of DPI Adjustable: 1200/1600/2400 DPI, wireless optical engine, precise positioning. 3、Ergonomic Design: Long term use will not be fatigued, making work easier and using time longer. 4、Applicability: USB optical wireless mouse is suitable for desktop and notebook computers. 5、Plug and Play: Convenient, fast and portable. It can be used for games, leisure, entertainment and office. <p class="wang-edit-text"><p class="wang-edit-text"> <p class="wang-edit-text"> Item Type:&nbsp;Wireless&nbsp;Mouse Material: ABS Model: G839 Wireless Distance: Approx.10m / 10.9yd Work: Optoelectronics Number of Buttons: 4 Resolution: 1200/1600/2400 Dpi Operation Mode: Photoelectric Rated Voltage/Current: 1.5V / 7mA Battery: 1 x AA Battery (Battery not Included) System Requirements: for Windows 98 / Me / 2000 / Xp / Vista / Win 7 / Win8 / 10 / Vista&nbsp; OS or New Version. <style> .wang-edit-text{ font-family:'Arial' !important; } .wang-edit-text table { border-top: 1px solid #000; border-left: 1px solid #000; } .wang-edit-text table td, .wang-edit-text table th { border-bottom: 1px solid #000; border-right: 1px solid #000; padding: 3px 5px; } .wang-edit-text table th { text-align: center; }</style> 1 x Mouse 1 x USB Receiver Satisfaction - Our customers are our top priority. If you find any product problems after receiving the goods, such as damage and incorrect quantity of goods, please contact the seller immediately. We try our best to provide you with satisfactoryaftersalesservice</br>