[36 MONTHS SUPPORT] - If you encounter any problems in using the tecknet wireless mouse, please feel free to contact our professional customer service team, enjoying TECKNET 36 Months Warranty (Registered Only). [Plug & Play] - This wireless ergonomic mouse is extremely convenient to use - simply plug in the receiver and turn on the switch, and you can start using it without needing to install any drivers. The silent wireless mouse is smooth and durable, providing you with long-lasting use. [Wide Compatibility & Low Power Warning] - The wireless computer mouse is compatible with various devices including Windows/Mac/Chrome/Linux/laptop/computer. (Side buttons are not compatible with macOS) Additionally, the wireless mouse for laptop has low energy consumption and enters sleep mode after a few seconds of inactivity. Pressing any button will wake it up, with up to 24 months of battery life. When the battery is low, an LED light will flash. (2 X AAA batteries not included). [Ergonomic Design] - The cordless mouse is ergonomically designed so that your palm is positioned close to a vertical angle with the desktop, reducing pressure and pain on the wrist caused by holding the mouse in an inverted position for prolonged periods. [Silent Mouse] - This computer mouse is silent, allowing for use even in quiet environments like libraries. Additionally, the vertical mouse results in almost silent clicking, which avoids disturbing others and ensures that your work or study is not interrupted. [Higher DPI & 5 Adjustable Level] - DPI: 4800/3200/2400/1600/800. This wireless mouse can meet your daily needs with its 5 adjustable DPI settings. Upgraded technology allows this ergonomic mouse to run smoothly on different types of surfaces. When the DPI is changed, the light will flicker, and the number of flickers corresponds to the DPI level.