Features: Experience powerful audio amplification with the MAX98357A module, delivering up to 3.2W output at 4Ω impedance for enhanced sound performance. This amplifier features I2S digital audio input, operates efficiently between 2.7V and 5.5V DC, and offers selectable gain settings from 3dB to 15dB for customized audio performance. Ideal for adding audio amplification; supports I2S sampling rates (not to be confused with I2C), the standard digital audio protocol used to transmit audio data on a circuit board. The integrated chip is a Class D amplifier controller capable of operating between 2.7V and 5.5V DC. Due to its Class D design, it offers high efficiency, making it suitable for portable and battery-powered projects. Includes thermal and overcurrent protection. Audio inputs comply with the I2S standard and are compatible with both 3.3V and 5V logic levels. By default, the amplifier provides 9dB gain. Gain can be set to 3dB, 6dB, 9dB, 12dB, or 15dB by connecting pull-up or pull-down resistors. Specifications: Model: MAX98357A Output Power: 3.2W at 4Ω; 1.8W at 8Ω Power Supply: 5V DC PSRR: 77dB typical @ 1kHz I2S Sample Rates: 8kHz to 96kHz Gain Selection: 5-pin selectable (3dB, 6dB, 9dB, 12dB, 15dB) Dimensions: Approx. 1.9 x 1.8 cm (0.75 x 0.71 in) Package Includes: 1 x MAX98357A Audio Amplifier Module Note: Soldering may be required if connectors are needed. Color and appearance may vary slightly due to lighting and screen settings. Please allow for a tolerance of 0–2mm due to manual measurement.