Fangrui Product Details 1. Hxsj T37 2.4ghz 1600dpi 3-modes Adjustable Wireless Mute Mouse 2. Product : 3. Connection Method : 2.4 G Wireless 4. Rechargeable: Built-in Rechargeable Battery 5. Accurate Tracking: Professional Ic Positioning Accuracy 6. 10m Wireless Receiving Distance 7. Third Gear Dpi Adjustment Design 8. Silence Key: Silence Key: 5 Million Silent Designs, More Suitable For Office Use. 9. High Resolution: Max 1600 Dpi High Resolution For Fluid Motion 10. Metal Sump Design, High-end Wireless Mouse, Stylish, Easy To Carry. 11. Product Parameters: 12. Operation Mode: Opto-electronic 13. Type: 2.4 Ghz Wireless 14. Power Type: Rechargeable 15. Number Of Keys: 4 Keys 16. Key Life: 5 Million Times (mute Switch) 17. Wireless Distance: 10m 18. Battery Capacity: 500mah 19. Resolution: 1600dpi 20. Rated Voltage Current: 3.7v 8ma 21. Product Weight: 84g 22. Product Size: 110 X 65 X 35mm 23. Three-level Power Saving Mode: 24. - Three Seconds Into The First Sleep Light Flashing Continuously 25. - 1 Minute Or So To Enter The Secondary Sleep, Intermittent Flashing Lights 26. - 8 Minutes Or So, Go To Level 3 Sleep, The Light Goes Out 27. Package Includes: 28. - 1 X Rechargeable Wireless Mouse 29. - 1 X Usb Receiver 30. - 1 X Usb Charge Cable(80cm) 31. - 1 X Instruction Manual