AMNVOLT V4 ATS Mini SI4732 Radio ALL Band DSP Radio FM AM SSB LSB USB Receiver built-in Hi-Z Headphone Amplifier Circuit

V4 Update Content 1 Added a shield to the Si4732 receiver to suppress electromagnetic interference Add an ESD device 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 a more stable VCC RADIO power supply to preserve signal resonance and reduce noise 3 Use wired headphones as an FM antenna headphones are not included in the shipping package 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 5 Replaced with more expensive and superior accessories telescopic antenna and a non slip knob cap with a better feel Basic Features 1 Utilizes the ESP32 S3 controller SI4732 DSP chip supports all band broadcasting LSB USB AM FM mode and supports AGC ATT 2 1 9 inch IPS high definition color screen with adjustable backlight brightness and battery level display 3 Built in 1W cavity speaker for loud and pleasant sound quality 4 Supports the latest firmware upgrade The factory installed firmware version is at least VER 2 3 1 Due to frequent firmware updates please update to the latest firmware according to the manual upon receipt to maintain the latest user experience 5 Built in headphone amplifier circuit ensuring loud volume when listening with headphones 6 Built in Hi Z circuitry improves weak signal