Audio output converter device

Requirements: 1. Connect the engineered device to the mobile phone's jack output 2. The device has to have an analog button to amplify the signal (like the volume button on a radio) 3. Another button / switch to change the sinus sound waves to square waves. (on or off) 4. Change the voltage to 50-100V (based on the amplifying) The power source of the device is a small battery (AA or 9V). The output is also a jack socket (mono).