- Two using ways: Hold in hand and place on desktop<br />- With left/right clicker、 optical trackball and scroll wheel<br />- The wheel is directly under your thumb、 convenient to operate<br />- Connect through USB 2.0/1.1 port<br />- Cable length: 180cm<br />                                                                                                                                Dimensions: 4.13 in x 2.05 in x 1.81 in (10.5 cm x 5.2 cm x 4.6 cm)<br />Weight: 5.71 oz (162 g)