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 Item Type: Power Amplifier Board Model: TDA7492 Material: ABS + Chip Color: As Pictures Shown Highest Frequency Response: 20K Quantity: 1PCS With 4 sets of gain adjustment Weight: Approx. 71g Package Size: Approx. 8x7x3cm/3.15x2.76x1.18inch PackageList1 xHigh Power Digital Power Amplifier Board NoteNote: 1. When the speaker impedance is 4 Ohms, the operating voltage must be less than 18V 2. When the speaker impedance is 6 Ohms, the operating voltage cannot exceed 24V 3. When the speaker impedance is 8 Ohms, the operating voltage cannot exceed 26V 4. Do not reverse the polarity of the power supply