Specification: Origin: Mainland China Output Power: 500mw (Drive Headphones), 3wx2 (Drive Speakers)   Frequency Response Range: 50hz-18khz    Equivalent Noise: ≥30db   Supply Voltage:3.0v-5.0v   Supply Current:1000ma At Maximum Volume, 60ma At Minimum Volume (For Reference Only)   Sound Channel:Stereo Product Size:77*46*32mm/3*1.79*1.25in Description: 1. Adopt advanced digital audio signal processing (DSP) and FM modulation phase-locked loop (PLL) to make the sound more realistic, more stable performance, long working time and no frequency deviation. 2. LCD display is more intuitive and accurate, very low power consumption and minimal noise. 3. You can search for radio stations and store the radio function, easy to operate. 4. Built-in 30 digital volume adjustment buttons operation can be done easily. 5. Auto power off memory data before power failure. 6. Speaker / headphone output automatic switching 7. Quartz crystal frequency stabilization, temperature changes no longer receive frequency drift. 9. Professional audio DSP audio signal analysis processing, automatic mute no signal or weak FM signal noise time, away from the traditional FM radio signal or weak signal, no annoying rustle. 10. Digital incremental rotary encoder to adjust the use of volume and frequency feel good, accurate positioning, stable and durable, 360 ° rotation without dead angle. 11. 30 levels of digital volume adjustment range 12. Support serial communication control, use other computers or devices to control the MCU module with serial full functionality. Note: The radio (any radio) is radio sensitive equipment, interference from the power supply or nearby may affect the normal operation of the module. Therefore, it is recommended that the power supply for the module be a battery or a stabilized voltage obtained from an industrial frequency transformer after voltage regulation. Can not use switching power supply (such as cell phone chargers, and any other switching power supply), rechargeable treasure, switching DC-DC converter, there can not be working near the class D amplifier, microwave ovens and other equipment that will produce high-frequency electromagnetic interference. Otherwise, the electromagnetic interference generated by these devices will be coupled to the RF front-end of the module through space, so that the reception of the restored signal noise. Due to the different monitor and light effect, the actual color of the item might be slightly different from the color showed on the pictures. Thank you! Please allow 1-2cm measuring deviation due to manual measurement. Included: 1*FM Radio Receiver Module 1.Advanced DSP & PLL: This FM radio receiver module utilizes advanced digital audio signal processing (DSP) and FM phase-locked loop (PLL) technology, ensuring high-quality broadcast reception with lifelike sound reproduction. 2.Stable Performance: With stable performance and exceptionally low power consumption, this digital FM receiver module provides long-lasting operation without compromising efficiency. 3.Long Working Time: Designed for extended usage, this frequency modulation stereo receiving module is built to be durable and compact in size, making it suitable for portable applications or installations where space is limited. 4.Accurate LCD Display: The digital stereo FM radio receiver module features an intuitive LCD display screen that provides accurate information, allowing users to easily navigate and access the desired functions with minimal effort. 5.Comprehensive Functionality: Equipped with storage and search capabilities for radio stations, 30-level digital volume control, automatic shutdown with data storage, automatic speaker/headphone output switching, and crystal-clear sound quality, this stereo radio receiver module offers versatile functionality with user-friendly operation and minimal noise interference.