An electroluminescent wire includes a continuous base wire, plated with a metal modified layer. Thereby, a user can use hisher single finger to make the tongs rotate in either direction by pressing the right-rotation button or the left-rotation button, or open or close the tongs by pressing the lever. The stream of gas used in the gaseous ND filter can be discharged at a supersonic velocity and the gas can be a single gas or a mixture of gases. If the USB apparatus is connected to the external apparatus, a controller executes a driver program corresponding to the USB apparatus and accesses the USB apparatus through the data channel.