This is the Microsoft Wedge Touch Bluetooth Mouse model 3LR-00004. Wedge Touch Mouse features a touch sensitive surface that responds to one finger touches differently depending on where they contact the surface. Stroke with one finger vertically or horizontally to scroll. Press your left finger for "Left click". Press your right finger, while slightly lifting your left finger, for "Right click". Not only is Wedge Touch Mouse compact, it doesn't come with cables or USB transceivers. Just turn it on and connect it to your Bluetooth-enabled laptop or tablet. Additionally, BlueTrack technology means it tracks on virtually any surface, whether you're at a conference or a coffee shop.