1. A shield has been added to the Si4732 receiver to suppress electromagnetic interference; an ESD device has been added to the antenna input to protect the chip.2. The Hi-Z circuit has been moved to the front of the antenna path and uses the more stable VCC_RADIO power supply to preserve signal resonance and reduce noise.3. The ability to use wired headphones as an FM antenna has been added (this requires use in an environment with a strong FM signal and a long headphone cable for optimal performance).4. The left and right audio channels have been swapped; the amplifier and speaker parameters have also been retuned to improve sound quality.Controller: ESP-32-S3Operating Modes: FM/AM/LSB/USB (Note: Airband is not supported)Receiving Bands: HF/SW/MW/VHFFrequency Range: LW, MW, SW (150kHz - 30MHz), VHF (64-108MHz)Screen: 1.9-inch, 170x320 resolutionScreen Brightness: Adjustable from 32 to 255 levelsCharging Port: TYPE-C (Cannot be charged with a fast charger)Audio Port: 3.5mm three-way stereoAntenna Port: SMA-KE (female)Battery Capacity: 800mAhColor: BlackMaterial: Metal CNCPackage Contents:1 x Radio1 x Telescopic Antenna1 x Circular AntennaOnly the above package content, other products are not included.Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.