Description: The use of advanced digital audio signal processing (DSP) and FM modulation phase-locked loop (PLL) to make sound more realistic, more stable performance, long working hours without frequency offset. LCD display is more intuitive and accurate, with a very low power consumption and minimal noise Can search for radio stations and store radio function, easy to operate Built-in 30 digital volume adjustment button operation can be easily done Automatic power-down memory data before the power failure Speaker / headphone output automatic switching Quartz crystal frequency stabilization. The professional audio DSP audio signal analysis and processing, automatic mute no signal or weak FM signal noise floor of the big time, away from the traditional FM radio signal or the signal is weak in the absence of annoying when rustle Digital incremental rotary encoder to adjust the volume and frequency of use feel good, precise positioning, stable and durable, 360 rotation without dead ends 30-level digital volume adjustment range Support for serial communication control, use other computer or device control MCU module with serial full functionality. Specification: Output power: 500mW (drive headphones), 3W x 2 (driving the speaker) Frequency range: 50Hz-18KHz Receiving frequency range: Close the campus radio 87.0MHz-108.0MHz, Open campus radio 76.0MHz-108.0MHz Equivalent noise: 30dB Supply voltage: 3.0V-5.0V Supply Current: maximum volume 1000mA, minimum volume at 60mA (for reference only) Channel: Stereo Package Includes:(2 Pack) 1 x Digital Stereo FM Radio Receiver Module