Ergonomic design offers comfortable hand feeling, it feels great to grasp or just touch this wireless mouse Dirt-proof and skin-friendly coating Meticulously crafted bottom, the foot mat is a full ring, smooth to slip with moderate resistance, great for using on your desk Integrated battery cover on the top, easy to take out the battery or USB receiver Built-in 1200DPI high precision infrared sensor, low power consumption; left and right key support 5 million times clicking, long lasting and durable 6 Months Warranty