- Two using ways: Hold in hand and place on desktop<BR>- 2.4GHz wireless transmit<BR>- Plug and play<BR>- Built-in 600mAh rechargeable battery、 standby time about 15 days (3 hours charging)<BR>- Come with a USB cable + cloth pouch + USB receiver<BR><BR><br />                                                                                                                                Dimensions: 4.17 in x 2.01 in x 1.93 in (10.6 cm x 5.1 cm x 4.9 cm)<br />Weight: 2.89 oz (82 g)<br /><br />