Features:   1) The radio is constructed according to the SDR principle-the function is determined by the loaded software;  2) Frequency range: 50 kHz to 200 MHz and 400MHz to 2GHz.  3) All types of analog modulation: AM, SSB, NFM, WFM;  4) Powerful functions: variable filter width, adaptive noise suppressor, threshold noise suppressor,  Noise reducer, AGC, equalizer;  5) Use the cheap but fully functional chip msi001;  6) Use powerful stm32h743 with a clock frequency of 480 MHz;  7) 3.5-inch IPS display with touch screen;  8) There is a built-in UHF;  9) Controls-2 encoder with buttons and touch screen;  10) The power supply is powered by the external TYPE-C (Huawei mobile phone) interface or battery (need to be used by the user), and can be charged by TYPE-C. The battery capacity is not less than 1500mA/h.  11) 300mA current consumption when listening to headphones;  12) Reception on the built-in telescope or external antenna In order to improve the HF reception on the telescope antenna, please turn on.  An add-on board with a source follower was released. The board will be built into the standard receiver design.  13) Connect to the computer via USB, you can transfer CAT, IQ and audio.  14) 160 kHz span, with scalability;  15) Sensitivity-under the condition of up to 250MHz, s / w is 0.3μV = 10dB; the limit receiving sensitivity is almost close to -130dbm.  16) DSP filter adjustment range: 0-10KHz (preferably adjusted to 50Hz-3KHz voice clarity and anti-interference ability) 17) Due to the characteristics of the msi001 chip used, the dynamic blocking range is about 85dB.  18) With backlight control;  19) SMA female antenna socket;  20) The size of the main board is 100X70mm (excluding protruding rods);  21) Mainboard weight 78g.    The simple operation instructions are as follows:    1. Turn on: Press and hold the power switch for 2 seconds to turn on.  Shutdown: Press and hold the power switch for 2 seconds to shut down.    2. The knob in the upper right corner is used to adjust the volume and DSP bandwidth. Click this button to 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 the number, turn this knob to adjust the frequency value of the number. Tap the frequency value with your finger to adjust the position of the underline. Adjust the desired frequency. If the screen is blank, press the knob to light up the screen. Click the knob to switch between headphones and speakers.    4. Receiving mode conversion: press and hold the knob on the upper right for 3 seconds, then release it. There will be 5 receiving modes in the middle of the screen. Tap the selection with your finger to switch between USB LSB AM NFM WFM. If you don't want to switch, you can click the knob in the upper right corner again to exit.    5. Click BAND in the lower right corner of the screen, the internal frequency used before shutdown will be displayed. Tap with your finger to make a call directly. If it is the registered version, you can press and hold the frequency box and then hear a beep. The registered version has no storage function. Click BAND in the lower right corner of the screen to switch between page 3 and storage page. Click the knob in the upper right corner to exit.    6.