Radio FM with digital display for self-assembly and soldering. Wireless radio based on RDA5807 chip with frequency reception in the range FM 87.0MHz–108.0MHz. Radio operates on frequencies: FM 87.0MHz–108.0MHz. Active and passive o output. Foldable dedicated radio antenna up to 25cm and 4-bit red digital LED display. Power supply: DC 3V/5V. Output impedance: 8 ohm. Output power: 0.5W. Output channel: Mono. Frequency accuracy: 0.1MHz. Radio size (assembled): 107 x 70 x 23mm. Instructions: Use the two-position switch to turn the power on or off. Press V+ or V- to adjust the volume. 15 volume levels available; hold the button to adjust. Press F+ or F- to tune the receiving frequency or select FM stations. Potentiometer allows volume control using a screwdriver. For instructions, refer to the QR code or link provided. A printed mounting diagram is included on the board. Pay attention to component polarity for capacitors, diodes, transistors, and LEDs. For LEDs, the longer lead is positive. Most components have identifying markings on the housing. Resistors may have color bands indicating resistance and tolerance, which can be read using online calculators or measured with a multimeter.