Feature Highlights: 1. 2.1 Channel Bluetooth Amplifier Board – Delivers 50W+50W+100W output, with easy switching between AUX, Bluetooth, and USB modes. 2. Multiple Input Options – Supports AUX audio input, USB playback, and Bluetooth 5.1 connectivity. Use the track wheel button to switch modes and skip tracks effortlessly. 3. High-Fidelity Sound Quality – Equipped with output filtering for clear, detailed audio. Enjoy Hi-Fi sound with high definition and low distortion. 4. Easy System Integration – Designed to connect seamlessly to your existing audio setup, making it ideal for KTV systems, home theaters, or custom sound projects. 5. Durable & Reliable Performance – Built with quality components for stable operation, featuring protections against reverse connection, overheating, short circuits, and static. Product Details: This high-power amplifier board uses a TPA3116D2 chip and supports Bluetooth 5.1 for stable wireless transmission up to 15 meters. It offers versatile inputs: AUX, USB drive, USB sound card, and dual microphone ports. The board outputs 50W per left/right channel plus 100W for a subwoofer, working with speakers rated 20-50W (4-8Ω) and subwoofers 20-100W (3-8Ω). Power it with DC 12-24V (8A). A multifunction button controls playback—click to pause, double-click to skip, and hold to power on/off. It also supports the WuzhiAudio app for customizing Bluetooth names, passwords, volume, beep tones, lullabies, and firmware updates. Specifications: - Model: AM100 - Bluetooth Version: 5.1 - Output Power: 50W × 2 (L/R) + 100W (subwoofer) - Amplifier Chip: TPA3116D2 - Inputs: Bluetooth, AUX, USB drive, USB sound card, MIC × 2 - Power Supply: DC 12-24V, 8A (AC not supported) - Compatible Speakers: L/R channels 20-50W, 4-8Ω; subwoofer 20-100W, 3-8Ω - Protections: Anti-reverse connection, over-temperature, over-current, short circuit, anti-static - Color: As shown - Material: ABS Package Includes: 1 × Amplifier board with casing 1 × Set of screws and mounting accessories Note: Product appearance, color, or printed text may vary slightly between batches, which does not affect performance. Slight color differences may occur due to lighting or display settings. Measurements allow a tolerance of +/- 1-3cm.