The Gvido dual screen sheet music reader has been on the market since 2017 and Good e-Reader conducted a hands on review, before the device was available to the public. They sell single screen and dual screen hardware, but the dual screens do not have a hinge system, they basically sit side by side. GVIDO actually has developed their own foot pedal that will turn the pages forward or backwards and can connect up to the sheet music reader via Bluetooth or a USB to Micro USB cable.