Features: Ergonomic: Symmetrical for both left & right hands. Ergonomic design fits your hand curve delicate and comfortable to touch. Optical Engine: Accurate positioning strengthen the adaptability to the surface suitable for a variety of media improve your experience. Sensitive: 800-1200-1600dpi adjustable accurate click suitable for a variety of occasions providing accurate control. Comfortable: The skin-friendly rubber rollers have good texture and comfortable hand feeling providing more accurate browsing. Universal: Lightweight and portable it is very convenient to carry. A perfect companion for laptops in the home or office. Notice: Actual color may be slightly different from the image due to different display and light effect. Please allow 1-3cm deviation due to manual measurement. Description: Material:ABS Size: 115*61*29mm Rechargeable Battery: 500mAh(charging style) Battery Powered: 1 x AA battery(not included) Color/Style: As the picture shown includes: choice 1: 1 x Mouse 1 x Receiver 1 x Charging Cable choice 2: 1 x Mouse 1 x Receiver "