1. ESP32-S3 master control, 1.9-inch IPS high-definition color screen 2. SI4732 DSP chip is used, supporting full-band broadcasting, LSB USB AM FM mode. 3. Built-in 800 mAh battery, battery life is about 10 hours or more. 4. Support screen backlight brightness adjustment, battery power display, AGC/ATT 5. Built-in 1W power speaker Support firmware upgrade, users can also modify the system by themselves. Built-in headphone amplifier circuit, the volume is loud when listening with headphones (the 1st generation product does not have a headphone amplifier circuit, and the volume is very low when using headphones). Parameters: Master control: ESP-32-S3 Working mode: FM/AM/LSB/USB (note, does not support aviation band) Receiving band: HF/SW/MW/VHF Frequency range: LW, MW, SW (150kHz - 30MHz), VHF (64-108Mhz) FM(0.5-108Mhz) Screen: 1.9inch, 170*320 resolution Charging interface: TYPE-C (cannot use fast charging) Audio interface: 3.5mm three-band stereo Antenna interface: SMA-KE (inner hole) Battery capacity: 800ma Note:due to different production batches, the printed labels are different, which does not affect the use. Colour:Black Material:ABS Package Contents: 1 * Mini SI4732 Radio 1 * Telescopic Antenna