- Brand: VSON<br />- Model: V-890<br />- Radio frequency: 2.4GHz<br />- Mini receiver can be stored into transmitter for easy carry<br />- Technology: radio frequency<br />- Function: laser pointer、 page up/down、 built-in memory optional<br />- Control distance: 8m/26feet<br />- Powered by 1 * AAA battery included<br />- USB Plug-and-play、 no driver required<br />- Operating system: Windows 98、 SE、 ME、 2000、 XP、 Mac OS、 Linux、 and Vista<br />                                                                                                                                Dimensions: 0.83 in x 0.75 in x 5.2 in<br />Weight: 4.6 oz