Specification Material: ABS Return rate: 500HZ Connectivity Technology: USB cable Sensor Technology: Optical DPI: 600/1000/1600 Buttons: 6 Light: Blue long bright (the button on the bottom to switch off the light) Operating Voltage: 5V Operating Current: <165mA Item Weight: 210g 10g / 7.41oz 0.35oz Item Size: 149 * 99 * 95mm / 5.87 * 3.90 * 3.74in The M618 Plus ergonomic vertical mouse is shaped in a way of the position of your arm. What makes this mouse unique compared to regular mouse is that it keeps the user's hand in an upright neutral posture. Therefore, it reduces forearm twisting, elbow stiffness and hand weakness so provides better comfort and relieving wrist pain. Features The vertical design provides better support for your forearm, minimizing wrist pain. You will remain comfortable even after long hours of clicking, tracking, and scrolling. 3 adjustable DPI easily change the cursor's sensitivity to meet your multiple needs, either for daily work or gaming. 1600 DPI Resolution Optical Tracking Technology provides more sensitivity than standard optical mice with smooth and precise tracking on a wide range of surfaces. All buttons are easily operated without contorting your fingers. Plug and play directly, easy operation.