Quantity   Component name
1 × Arduino Pro Mini
1 × DFPlayer Mini
1 × 0.25W Speaker
1 × 1.3" OLED Display
1 × 2500mAh LiPo Battery
1 × TP4056 LiPo Battery Charging Module
2 × Encoder with Knob
1 × Three Position Switch
1 × Emergency Stop Button