performance design: This Bluetooth Power Amplifier Board delivers solid performance under strict quality standards. It is a costeffective amplifier module intended for use with a Bluetooth 4.0 receiver/amplifier card. Batterypowered durability: Made from materials and capable of powered operation from an 18650 battery, this board is designed for long service life and extended use. Easy installation: The AMP board installs simply without requiring complex procedures. Precision craftsmanship by experienced technicians ensures reliable performance. USB charging: The XH A153 Bluetooth power amplifier board uses USB charging, allowing charging from a charger, power bank, or computer for convenient use in daily life. Use scenario: Build a compact wireless Bluetooth speaker for home, office, or outdoor use, powered by an 18650 battery for portability. Use scenario: Create a small portable audio system for cars, bikes, or camping setups, leveraging USB charging and the onboard amplifier. Use scenario: Upgrade a desk or home audio setup by integrating the board into a DIY project or custom enclosure for enhanced Bluetooth audio output.