- 2.4GHz radio frequency RF wireless operation<br />- Works up to 15 meters away<br />- Built-in red laser pointer<br />- Powered by 1*AAA battery (not included)<br />- Support Windows 2000、 XP、 Vista<br />                                                                                                                                Dimensions: 4.17 in x 1.54 in x 1.02 in<br />Weight: 1.41 oz