Bluetooth 5.0 version provides higher transmission efficiency and a transmission distance of up to 15 meters without obstruction. Equipped with a sizeable heat sink for efficient heat dissipation. Features a potentiometer for volume adjustment and an on/off switch for easy control, suitable for DIY speaker projects. If installed in a metal enclosure, ensure the Bluetooth antenna is properly extended. Uses a copper DC connector designed to handle high current with minimal heat generation. Incorporates 4x 470uF capacitors to ensure stable power storage and consistent power delivery, supporting high-quality o performance. Includes a DC power jack with cable that is compatible with the product’s power input interface, allowing connection even if a DC adapter or battery is not immediately available. Adaptation Supply Voltage: 5–24V (compatible with 9V, 12V, 15V, 18V, 24V adapters; higher voltage recommended) Power Output Examples: - 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: Domestic Filter: Included Compatible Speaker Power: 50W–300W Speaker Impedance: 4 ohm–8 ohm Channels: Stereo (Left and Right) Bluetooth Version: 5.0 Bluetooth Range: 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 Usage Notes: The power switch on the board is a standby switch. When turned off, the unit enters a low-power standby mode. To completely disconnect power, unplug the DC power connector. For optimal performance, ensure sufficient o input signal and adequate power supply voltage and current. Higher supply voltage results in increased output power. Output power varies depending on speaker impedance. With sufficient power supply, higher impedance speakers will produce relatively lower output power. Note: Package includes only the items listed. Other accessories or devices shown are not included. Color variations may occur due to lighting and display differences. Measurement tolerance: ±1–3 cm.