Instructions 1. On/Off: USB 2.The knob in the upper right corner is for volume adjustment and DSP bandwidth adjustment. Pressing this button can switch between volume adjustment and DSP bandwidth adjustment. 3. The second key in the upper right corner is frequency adjustment. When the underline at the bottom of the frequency is at which position, rotate this knob to adjust the frequency value of that position. Press with your finger at the frequency value position to adjust the position of the underline, in order to adjust the frequency you want. If the screen is silent, pressing this knob can make the screen light up. Pressing this knob can also switch between headphones and speakers. 4. Reception mode conversion: Press and hold the top right knob for 3 seconds, and then release the middle of the screen to display 5 reception modes. Press and select with your finger to switch between USB LSB AM NFM WFM. If you don't want to switch, you can click the top right knob again to exit. 5. Clicking on the BAND button in the bottom right corner of the screen will display the internal frequency used before the last shutdown. Clicking with your finger can directly call it up. If it is a registered version, you can long press the frequency box to hear a beep for storage, but the non registered version does not have storage function. Clicking BAND in the bottom right corner of the screen can switch between 3 storage pages. Press the knob in the upper right corner to exit. 6. Internal settings: Press MENU in the bottom left corner of the screen to enter, and press HARD to enter EN1 Reverse and EN2 Reverse refers to whether the clockwise or counterclockwise adjustment of the two knobs in the upper right corner increases. However, non registered versions cannot be saved and reset after shutdown, so there is no need to adjust this.

?Receiver Circuit Improvement? The receiver circuit board adopts 4 layer PCB and shielded from interference. Signal reception sensitivity of each frequency band to - 125dB. ?3.5inch Touch Screen? The power supply is provided by an external TYPE-C interface or a battery (user provided), which can be charged by TYPE-C. The capacity of the battery shall not be less than 1500mA/h. The Shortwave Receiver connect to the computer via USB and transfer CAT, IQ, and audio. The screen has been adopt 3.5 inch IPS touch screen (with backlight control). ?High Sensitivity?Built-in Variable Filter Width, Adaptive Noise Suppressor, Threshold Noise Suppressor, Noise Bianker AGC Equalizer making the radio more powerful. The sensitivity of the portable shortwave radios receiver is 0.3 at s/w under conditions up to 250MHz µ V=10dB. LNA/MIX, MIX GR: Do not turn on the functions that are not available, otherwise the gain and sensitivity will decrease significantly! RF GAIN: The sensitivity is optimal when set at around 20. ?Frequency Range? Frequency range from 50kHz to 250MHz and 400MHz to 2GHz (registered upgrade version). Select Frequency Step: Press the frequency knob to switch to step mode, and then use the frequency knob to adjust as needed. Minimum Step: 10Hz ; Maximum Step: 30KHz. Powerful STM32h743 with clock frequency of 480MHz applied. ?1.10A Malachite SDR Radio Board?The All Band Radio Receiver is built based on the principle of DSR - its functions are determined by the loaded software. All types of analog modulation: AM/SSB/NFM/WFM. Using a Multi-Functional chip MSI001, the dynamic blocking range is approximately 85dB.