Brand: Dell Model: WM123 Color: Black Easy setup Comfortable design Windows 8 compatible Wireless connectivity Longer Battery Life 1 Year Product Warranty SPECIFICATIONS Brand: Dell Model:WM1236 Color: Black Wireless Receiver: USB wireless receiver Buttons: 3 Interface: RF Movement Detection Technology: Optical Movement Resolution: 1000 dpi Connector Type: 4 pin USB Type A FEATURES Wireless 3-button optical mouse Features Plug and Play convenience Gives a clutter-free workspace with wireless connectivity Provides great performance with excellent battery life Comes with a comfortable and contoured shape Brand Dell SKU DE262EL0FH5Y4NAFAMZ-248051 Model WM123