Features 1.Precise cuts and interfaces ensure perfect serviceability, suitable for installation locations, easy installation. 2.Made of high quality materials, which can effectively avoid corrosion and wear, sturdy and durable. 3.Professional chip sets provide superior performance in the system. 4.Easy to operate, anti-aging design, prolong service life. 5.With super output short circuit and over-temperature overload protection, and prevent switching machine impact. 6.Super small size can used for maintenance, polishing the active speaker, improve the sound quality, can also used to combine multiple blocks into a multi-channel amplifier or 2.1 amplifier. specificationCondition: 100% Brand New_x000D_ Item Type: Power Amplifier Board_x000D_ Model: TDA7492_x000D_ Material: ABS + Chip_x000D_ Color: As Pictures Shown_x000D_ Highest Frequency Response: 20K_x000D_ Quantity: 1PCS_x000D_ With 4 sets of gain adjustment_x000D_ Weight: Approx. 71g_x000D_ Package Size: Approx. 8x7x3cm/3.15x2.76x1.18inch PackageList1 xHigh Power Digital Power Amplifier Board NoteNote:_x000D_ 1. When the speaker impedance is 4 Ohms, the operating voltage must be less than 18V_x000D_ 2. When the speaker impedance is 6 Ohms, the operating voltage cannot exceed 24V_x000D_ 3. When the speaker impedance is 8 Ohms, the operating voltage cannot exceed 26V_x000D_ 4. Do not reverse the polarity of the power supply