A perfect item for work. It 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 for a long time. 4 adjustable DPI, switch between DPI levels 800, 1200, 2400 and 3200 to adjust mouse responsiveness depending on your need and preference. The mouse can be used on any desktop, wireless 2.4G, plug and play, with an operating distance of up to 10 meters. All the list prices are based on black right mouse. The left one is more expensive than the right one, and the white one is more expensive than the black one. The price for 3,000 or over are based on ocean shippments.