A retractable device of sun shading suspensory umbrella mainly comprises an upper and lower support umbrella rods, ribs and hand cranking device. The hearing instrument further includes an opening in the housing for receiving the exchangeable receiver therein, and a coupler for actuatingde-actuating a physical coupling between the housing and the exchangeable receiver and for enabling the housing to hold the receiver. The machine can receive instructions in mark up language documents accessed at an HTTP address to cause operation of transaction function devices, such as a currency dispenser and a display device.