1、EASY TO USE: The FM_ANT port of the FM receiver module is used to connect the FM antenna. For better reception of FM signals, it is recommended to connect an external 75cm length trolley antenna.  2、SPEAKER FUNCTION: The digital FM radio module comes with a 3W x 2 channel sound amplifier, so if you need speakers, you can plug them into the speaker port. Practical and convenient.  3、HEADPHONE FUNCTION: The digital FM receiver module automatically switches to the headphone channel if headphones are plugged in, and the speaker channel is automatically started up.  4、AUTOMATIC SEARCH: FM radio module is simple and short to operate, press the encoder to automatically search for local radio stations, adjust the receiving frequency, the LCD screen shows the current frequency, the search stops when a valid station is found.  5、TURN ON OR OFF: Press and hold the VOL knob to switch the FM radio module on or off, the LCD display shows the caption ON to turn on the automatic noise, OFF to turn off the automatic noise.