Description: This amplifier board features stable output and quick response, which has high performance. You can enjoy noise-reduction, pure and dynamic sound effect because this amplifier board adopts intelligent chip. It is constructed of PCB material. The length of the amplifier board is 5.4cm and width is 3.3cm This amplifier board is widely used, which is suitable for being used in speaker, radio and so on. Item Name: Amplifier Board Material: PCB Power Interface: Micro 5P Input Voltage: 3.7V-5V Amplifier Working Mode: Switchable Class AB and Class D Signal-to-Noise Ratio: 90dB THD+N: -70dB Crosstalk: -86dB DNR: 91dB Features: Intelligent Chip, Pure Sound Effect, Lightweight Size Details: 5.4cm x 3.3cm/2.13" x 1.3" (Approx.) Notes: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Package Includes: 1 x Amplifier Board This amplifier board features stable output and quick response, which has high performance. You can enjoy noise-reduction, pure and dynamic sound effect because this amplifier board adopts intelligent chip. It is constructed of PCB material. The length of the amplifier board is 5.4cm and width is 3.3cm This amplifier board is widely used, which is suitable for being used in speaker, radio and so on.