"The ProtoArc EM01 has a traditional, right-handed mouse design that places the cursor trackball at your thumb for more comfortable navigation." Taylor Clemons - ZDNet Thumb-Control Trackball RGB Light Design 2.4G USB + Bluetooth Connection Lithium Battery Capacity: 900mAh Click Life: More Than 3 Million Times DPI Level: 1000/1600/2400 The new version will have 5 DPI levels (200/400/800/1200/1600