Audio input through 3.5mm linear audio cable:Connect to external pickup through 3.5mm audio
cable (When connecting to external pickup, audio in automatically switch into external pickup.)
1.5. Audio Output
Built-in speaker: It is default that device output voice through built-in speaker.
Audio output through 3.5mm linear audio cable:Connect to external speaker through 3.5mm audio
cable (When connecting to external speaker, audio out automatically switch into external speaker.)