Fangrui Product Details 1. Esp32-s3 Master Control, 1.9-inch Ips High-definition Color Screen 2. Si4732 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) 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