Quantity   Component name
4 × UM3561 Audio ICs / Specialty Audio ICs
2 × 5k potentiometer
1 × 1uf capacitor capacitor
1 × DPDT toggle switch power on/off
1 × CR2032 battery holder 3v power
1 × mini mono audio jack socket WQP-PJ301M-12_JACK
10 × 1M resistor the values here can be changed to taste