Application prototype implementation. We analyzed dozens of music and tones and selected 4 that have average frequencies from 100 to 200 KHz, and prepared the layout of the application. When using the app, you can combine our zapper for greater efficiency.Implementation of a prototype app. We analyzed dozens of music and tones and selected 4 that have average frequencies from 100 to 200 KHz and prepared the layout of the application. When using the app, you can combine our zapper for greater efficiency.