Product details: - High-precision, energy-saving features combine to create performance that's unsurpassed / The Mi Wireless Mouse has a built-in high-precision optical sensor with resolution up to 1200 dpi. It uses infrared light thats perfect for work gaming and a wide variety of other applications. - Additional features include quality tracking and an energy-saving design. The right and left buttons have a life of over 5 million clicks making this one of the most durable mice on the market. - Wireless infrared sensor / Quality tracking with resolution up to 1200 dpi. Tracks effortlessly on almost any surface including desks sofas tablecloth and leather. - Ergonomic design matches the contours of your hand for a firm and comfortable grip / the design of a mouse has a direct effect on the comfort of your grip. The Mi Wireless Mouse features a classic shape that is designed to be more closely aligned with the contours of your hand. It fits right into the palm of your hand for the most comfortable grip possible. - Low power consumption and more energy efficiency / The mouse uses 1 AA battery. Its battery life lasts up to 1 year, making it more durable and energy efficient.