Fangrui Product Details 1. Integrated Audio Components: Built In Inmp441 Microphone And Max98357 Amplifier, With Clear Voice And Sensitive Dialogue. 2. Convenient Programming Interface: Built In Ch340x, Type-c Interface Supports One Click Program Burning Without Manual Reset. 3. Battery Management Function: Built In Tp5400 Battery Management Chip, Supports External Batteries, And Displays The Charge Level. 4. Multi Functional Button Design: Equipped With 5 Functional Buttons, Flexible Operation, And Support For Multiple Ai Interaction Functions. 5. Strong Scalability: Reserved Detection Interface, Type-c Interface Combines Charging And Data Transmission Functions. Interface: Type-c Interface Speaker Interface: Connected To A Ph2.0 Interface Speaker, Without Distinguishing Between Positive And Negative Poles Battery Interface: Connect To A 3.7v Battery With A Ph2.0 Interface, Pay Attention To Distinguishing The Positive And Negative Poles Type-c: Combining Charging And Data Transmission Functions Built In Ch340x, One Click Burn