Features: 2.4G wireless mouse, operating range up to 15 meter. Mini USB adapter, plug and play, can be stored at the bottom. Come with a power switch for power-saving. 6 buttons, for more convenient operations, including left/right button, scroll wheel, DPI button, advance/retreat button. Quick thumb function: with advance button and retreat button, fast forward or backward when browsing the web, forward or backward at the same folder window. Maximum resolution: 2400 DPI, and 4-level adjustable DPI: 1000/1200/1600/2400 DPI, meet your various need. Ergonomic shape, fit snugly under your palm, effectively reducing the fatigue during the intense working. Powered by 2 * AAA batteries (not included). Note: To use the wireless mouse, please turn on the switch (at the bottom) when you have inserted the USB adapter.