Evoluent Verticalmouse 4 mouse Bluetooth Ottico 2600 DPI (An Evoluent product. RIGHT HANDED Evoluent VerticalMouse 4 Bluetooth in white - Windows OS variant. Patented vertical mouse that supports your hand in a relaxed handshake position- and eliminates the arm twisting required by ordinary mice. The 4 is the latest evolution of this award winning ergonomic mouse now features: Improved comfort/support- pointer speed and laser sensor adjustable from the mouse and 6 programmable buttons. Supplied by Hypertec [2Years warranty])