The MAX98357 digital input Class D audio power amplifier helps designers achieve compact, efficient, plug-and-play solutions with high cost performance. In addition to its small size, the device can achieve 3.2W Class AB amplifier sound quality with Class D amplifier efficiency, achieving excellent high-fidelity sound effects, suitable for a variety of product applications. Plug and Play: Only a single power supply is required, and 35 different clocks and 128 digital audio formats can be automatically configured. Suitable for microcontrollers or development board systems with I2S audio output such as for Raspberry Pi, for Arduino and ESP32 tools. The device provides excellent electromagnetic interference (EMI) suppression, allowing the use of long cables to connect speakers without adding external filtering. In addition, the device provides the industry's highest Class D efficiency. Output power:3.2W at 4Ω, THD is 10%; 1.8W at 8Ω, THD is 10% 12S sampling rate:8Khz-96Khz Note: Due to different production batches, there are differences in printing/appearance, which does not affect use. Colour:Purple Material:PCB Package Contents: 3 x MAX98357 Audio amplifier module Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.