Features: Quality Sound Output The Bluetooth-compatible Amplifier Board features decoding technology, ensuring excellent sound quality. Multiple Input Connect various device to the amplifier board via USB and AUX for easy music play. Suitable for Music Enthusiasts Perfect for individuals who appreciate superior performances. Wide Applications For entertainment setups, studio, and conference room, providing for different activity. Enhances Experience Elevates your listen experience with the Bluetooth-compatible Amplifier Board, deliver sound. Specifications: Size: About. 64.8x50x24.5mm/2.55x1.97x0.96in Package Includes: 1pc Amplifier Board note: Please allow 1-2cm errors due to manual measurement. Due to difference between different monitors, the picture may not reflect the item actual color.