1、Adopt advanced digital audio signal processing (for DSP) and FM modulation phase locked loop (PLL) to make the sound more lifelike, more stable performance, long working time and no frequency deviation. 2、You can search for radio stations and store the radio function, and the built-in 30 digital volume adjustment buttons are easy to operate. 3、It is easy to use, automatically shuts down the memory data before power failure, and automatically switches the speaker/headphone output. The frequency of the quartz crystal is stable, and the temperature changes no longer receive frequency drift. 4、Digital incremental rotate encoder adjusts the volume and frequency of use, feels good, accurate positioning, stable and durable, and 360 degree rotation without dead angles. 5、The LCD display is more intuitive, more accurate, and has very low power consumption. Professional audio for DSP audio signal analysis and processing, automatically mute the time when there is no signal or weak FM signal with high noise, far away from the traditional FM radio signal or the signal is weak, and the noise is minimal. 6、Support serial communication control, use other computers or equipment to control the MCU module, with full serial functions. Item Type: FM Receiving Module Material: PCB BoardProduct Size: Approx. 75x45x30mm / 3.0x1.8x1.2in Mounting Hole Size: Approx. 67x37mm / 2.6x1.5in Mounting Hole Diameter Size: Approx. 3mm / 0.12in Model: BYS459-1500 Output Power: 500mW (Driving Earphones), 3Wx2 (Driving Speakers) Frequency Response Range: 50Hz-18KHz Receiving Frequency Range: Turn off Campus Radio 87.0MHz-108.0MHz, Turn on Campus Broadcast 76.0MHz-108.0MHz Equivalent Noise: ≥30dB Supply Voltage: 3.0V-5.0V Power Supply Current: 1000mA at maximum volume, 60mA at minimum volume (for reference only) Channel: Stereo 1 x FM Receiver Module 2 x Screw Nut 2 x Gasket