• Highfly: This could be the manufacturer’s brand or name.
• 4.5-28V: This indicates the voltage range that the circuit board can accept as input. It can work with input voltages ranging from 4.5 volts to 28 volts.
• Amp Boards PCBA: This suggests that the product includes an amplifier board in a PCBA (Printed Circuit Board Assembly) form. It’s a ready-made circuit board with components assembled.
• Adjustable Linear Regulated Power: This highlights that the circuit board allows you to regulate and adjust the power supply voltage in a linear, stable, and regulated manner. This is important for powering audio amplifiers to ensure clean and stable output.
• Audio Amplifier Circuit Board: This is the primary function of the board; it’s designed for building audio amplifier circuits. It provides the necessary power regulation and connections to support audio amplification.

The main purpose of this product is to provide a stable and adjustable power supply for audio amplifier circuits. It can take a wide range of input voltages and regulate them to a specific and stable output voltage, which is crucial for achieving high-quality audio amplification.