Features: Featuring ES8311+NS4150B chip for sound quality with high integration. The compact 26.1mmx17mm PCB design delivers premium audio processing while saving space in your projects. Built in digital microphone and 3W efficient power amplifier ensuring clear sound pickup and powerful output. Ideal for voice recognition and sound playback devices requiring crisp audio reproduction. Standard 10pin/2.54mm spaced interface with clearly defined pins enables quick connection to development boards. Suitable for plug and play functionality. Versatile compatibility with multiple power supply options (3V3+VCC recommended 5V+GND) and communication interfaces including I2C (SDA,SCL) and I2S for flexible integration. Low power design with ES8311 audio codec and NS4150B power amplifier support sound output for various applications like speakers, IoT device equipment. Specifications: Component:PCB Type:1/2 Size:Approx.26.1x17mm/1.02x0.67inch Chip: ES8311 Amplifier: NS4150B Amplifier power: 3W Pin specification: 10pin, 2.54MM Package Includes: 1Pc Amplifier Board note: 1.Please allow 1-2cm errors due to manual measurement, making sure that you not mind before order. 2.Due to the differences between different monitors, the picture may not reflect the actual of the item.