DUX M618 Mini 2.4G Wiress USB Rechargeable Vertical Mouse 1. For anyone who experiences wrist or hand fatigue when using a regular mouse. Its vertical design reduces the torsion of the forearm and wrist caused when using most other mice. 2. In addition to its comfortable, ergonomic design, adjustable sensitivity, which can be changed on-the-fly using the DPI button on the mouse. Another neat feature is the two thumb buttons, which perform back/forward browser navigation functions. 3. Material: ABS 4. Working Voltage: 5 V 5. DPI: 800/1200/1600/2400DPI 6. Response Rate: 125 Hz 7. Size: 10.5 x 9 x 7cm 8. Package include: - 1 x Vertical Mouse - 1 x User Manual 9. With RGB light 10. Compact and easy to carry