1. Bluetooth version 5.0 provides higher transmission efficiency and longer transmission distance. 2. Large-size heat sink ensures efficient heat dissipation. 3. Potentiometer allows volume adjustment with an on/off switch for easy control, ideal for DIY speaker projects. If using a metal enclosure, the Bluetooth antenna must be extended externally. 4. Copper DC connector is used to handle high current with minimal heat generation. 5. Equipped with 4x 470uF green gold capacitors to ensure sufficient power storage and continuous, stable power supply for improved o performance. 6. DC power input with cable allows compatibility with the product’s power interface. Easy connection even without a dedicated DC adapter or battery. Adaptation Supply Voltage: 5–24V (compatible with 9V, 12V, 15V, 18V, or 24V adapters; higher voltage recommended for optimal performance) Power Output: - 12V: 24W + 24W (8 ohm), 40W + 40W (4 ohm) - 15V: 32W + 32W (8 ohm), 60W + 60W (4 ohm) - 19V: 64W + 64W (8 ohm), 80W + 80W (4 ohm) - 24V: 72W + 72W (8 ohm), 100W + 100W (4 ohm) Product Name: HIFI Bluetooth Digital Power Amplifier Board with Filter Model: 1002L Chip Solution: Standard digital amplifier With Filter: Yes Compatible Speakers: 50W–300W, 4 ohm–8 ohm Channels: Stereo (Left and Right) Bluetooth Version: 5.0 Bluetooth Range: Up to 15 meters (unobstructed) Protection Features: Overheating protection, short circuit protection Color: Black Material: Metal + PCB Package Contents: 1 x Bluetooth 5.0 Digital Amplifier Board 1 x Shell 1 x Screwdriver 1 x Power Cord Note: The power switch on the board is a standby switch. When turned off, the unit enters low-power standby mode. To completely disconnect power, unplug the DC power source. Tip: Optimal output power requires sufficient o input and adequate power supply voltage and current. Higher supply voltage results in higher output power. Output power varies with speaker impedance. With sufficient power supply, higher impedance speakers will produce relatively lower output power. Package includes only the items listed above. Other accessories or products are not included. Note: Lighting and display differences may cause slight variations in color between the image and the actual item. Measurement tolerance: ±1–3 cm.