Portable and lightweight, very convenient to carry. Intelligent connectivity, no need to code, plug and play. It is an ideal companion for your computer in the home and office. Ergonomically designed, long-term use without fatigue. Item Name: Wireless Mouse Material: ABS Tracking Mode: Optics Interface: USB 2.0 DPI: 1600-2000 Power Supply: 2 x AAA Battery (Not Included) Features: Wireless, Plug and Play, Portable, Ergonomic Design Wireless Mouse Size: 105mm x 57mm x 36mm/4.13" x 2.24" x 1.42" (Approx.) USB Receiver Size: 18mm x 14mm/0.71" x 0.55" (Approx.) Notes: Due to the light and screen setting difference, the item& 39;s color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Package Includes: 1 x Wireless Mouse (Battery Not Included) 1 x USB Receiver