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, ensure the Bluetooth antenna is properly extended. 4. Copper DC connector is used to handle high current with minimal heat generation. 5. Equipped with 4x 470uF high-quality capacitors to ensure stable power storage and continuous power supply, supporting high-quality o performance. 6. DC power input with cable ensures compatibility with the product’s power interface. Easy to connect even without a dedicated DC adapter or battery. Adaptation Supply Voltage: 5-24V (Compatible with 9V, 12V, 15V, 18V, 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) Parameter: Product Name: HIFI Filtered 2X100W Bluetooth Digital Power Amplifier Board Model: -1002L Chip Solution: Domestic With Filter: Yes Compatible Speaker: 50W-300W, 4 ohm-8 ohm Number of Channels: Stereo (Left and Right) Bluetooth Version: 5.0 Bluetooth Transmission Distance: Up to 15 meters (unobstructed) Protection Features: Overheating protection, Short circuit protection Color: Black Material: Metal + PC Package Contents: 1 x Bluetooth 5.0 Digital Amplifier Board 1 x Screwdriver 1 x Power Cord Note: The power switch on the board is a standby switch. When turned off, the device enters low-power standby mode. To completely disconnect power, unplug the DC power connector. 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 voltage and current, higher impedance speakers will produce relatively lower output power. Package includes only the items listed. Other accessories or products are not included. Note: Lighting and display differences may cause slight color variations between the image and the actual item. Measurement error allowed within +/- 1-3 cm.