Parameters Master ESP32 S3Receiving frequency band HF SW MW VHFScreen 1 9 inch 170 320Charging interface TYPE C fast charging is not available Audio interface 3 5mm three band stereoBattery capacity 800maBody size 7 3 3 2 1 2Body weight 54g Frequency 1 FM 64MHz 108MHz2 AM 520kHz 1710kHz3 SW 2 3MHz 26 1MHz4 LW 153kHz 279kHzMode FM AM LSB USB note that aviation band is not supported Color Black Blue White Orange Red optional Features 1 Using ESP32 S3 master control 1 9 inch IPS high definition color screen2 Using SI4732 DSP chip supporting full band broadcasting LSB USB AM FM mode 3 Built in 800 mAh battery battery life is about 10 hours or more 4 Equipped with 70cm portable telescopic antenna for reception 5 Shell petg 3D printing Package Include 1 x MINI SI4732 Radio1 x Telescopic AntennaOperation Guide 1 Double click the knob on the main interface to enter the menu2 On the menu page rotate the knob to switch menus and modes etc Click again to confirm 3 Rotate the knob on the main interface to switch frequency bands click again to confirm 4 Because the body is very mini and cannot prevent the headphone amplifier the volume output is low after inserting the headphones which is normal You can connect an external speaker to achieve a higher volume