... Description Features:- Bluetooth 2.0 Version, 1600DPI laser Technology;- With DPI switch, between 800DPI, 1200DPI and 1600DPI;- Hassle-free ... operation interface, easy to connect with a Bluetooth PC or Laptop. (A Bluetooth adapter is ... when using;- Compact size, easier to carry;- Built-in rechargeable Li-ion battery;- With power switch, more economical;- Charging by USB ...