Product Overview: This product is a high-performance digital radio, employing the ESP32-WROOM-32U dual-core Wi-Fi and Bluetooth main control chip. It features a 2.8-inch 320x240 IPS full-view touchscreen with resistive touch operation. It supports FM, shortwave, medium wave, and longwave reception, has a built-in 5000mAh lithium battery providing approximately 15 hours of battery life, and utilizes an independent dual-amplifier design. Equipped with a large speaker and headphone output, it is suitable for various radio listening scenarios. Basic Parameters: Main Control Chip: ESP32-WROOM-32U, 4MB Flash, supports Wi-Fi + Bluetooth Display: 2.8-inch IPS LCD screen, 320x240 resolution, supports resistive touch Control Method: Numeric keypad + rotary knob tuning, compatible with third-party touchscreen firmware Frequency Range and Steps: FM: 65-108MHz (Suitable for Russia/Eastern Europe, OIRT default step 30kHz) 76-95MHz (Suitable for Japan) 76-108MHz (Suitable for German Broadcasting) 87-108MHz (Suitable for Europe/Oceania/Africa/Asia) 87.5-108MHz (Suitable for China/USA) FM Steps: 50/100/200kHz, default 100kHz Shortwave (SW): 1700-27000kHz, default step 5kHz Medium Wave Medium Wave (MW): 522-1791kHz, default step 9kHz 520-1720kHz, default step 10kHz Long Wave (LW): 144-513kHz, default step 9kHz Receiver Specifications: FM: Sensitivity ≤ 0.5uV (S/N=30dB), Signal-to-Noise Ratio ≥ 60dB (Δf=150kHz) SW: Sensitivity ≤ 10uV (S/N=20dB), Signal-to-Noise Ratio ≥ 60dB (BW=3kHz) MW: Sensitivity ≤ 10uV (S/N=20dB), Signal-to-Noise Ratio ≥ 60dB (BW=3kHz) Long Wave (LW): Sensitivity ≤ 10uV (S/N=20dB), Signal-to-Noise Ratio ≥ 60dB (BW=3kHz) Hardware Configuration: Antenna Interface: Standard SMA external screw internal connector, supports external antenna Speaker Output: Uses TI TP46211A1 audio amplifier chip, driving a 45x45mm large-size speaker, 4W power, low output noise and low distortion Headphone Output: Uses MAX97220 headphone amplifier chip, standard 3.5mm audio interface, independent dual amplifier design for speakers and headphones, no interference between them Battery: 3.7V/5000mAh lithium battery, capacity 18.5Wh, dimensions 65x55x10mm Current Consumption: Approximately 3.7V/350mA, typical usage time approximately 15 hours Communication Interface: Built-in CH340 USB to serial port chip, communicates via Type-C interface Dimensions and Weight: 85mm x 49mm x 23mm (excluding antenna), body weight approximately 300g Operating Instructions: Basic Operation: Main Switch: OFF position disconnects the battery, ON position connects the battery. Please turn the machine OFF when not in use for extended periods. POWER Button: Power button. Short press toggles power on/off. TUNING Knob: Rotate to adjust frequency. Short press toggles function; long press opens TMS and EQ settings. VOLUME Knob: Adjusts volume. SQL Button: Squelch control. BW Button: Short press in FM mode: Stereo/Mono switch. Long press in FM mode: Demodulation bandwidth switch (selectable between 56, 64, 72, 84, 97, 114, 133, 150, 168, 184, 200, 217, 236, 254, 287, 311kHz and AUTO BW). Alternatively, press and hold the BW button while rotating the TUNING knob to select. Short press in AM mode: Demodulation bandwidth switch (selectable between 3, 4, 6, 8kHz). MODE Button: * Short press: Cycles between MAN (Manual Tuning), AUTO (Automatic Tuning), and MEM (Station Storage) modes. * Long press: Opens the menu page. BAND Button: * Short press: Switches bands, cycling through LW, MW, SW, OIRT, and FM. * Long press in FM mode: Opens the advanced ROS view or Alternative Frequency view. * Long press for more than 5 seconds: Enters sleep or screen-off mode. Storing Station Settings: * Tune to the frequency you want to store. * Press the MODE button until the "MEM" indicator on the screen is highlighted. * Press the TUNING button; "MEM" will turn red. * Select the desired preset channel number (displayed in blue. Red indicates that the channel is already stored, green indicates it is empty). * Press the TUNING button again to complete the storage. Advanced Operations: * Change encoder direction: Press and hold the BW button while powering on. * Rotate screen: Press and hold the MODE button while powering on. * Restore default settings: Press and hold the BW and TUNING buttons simultaneously while powering on. Package Contents: Radio main unit x1 Lithium battery x1 Type-C data cable x1 Instruction manual x1 Suitable Scenarios: Broadcast listening, emergency radio, amateur radio, teaching demonstrations, outdoor travel, etc.