Version 1.5.0 is a Bluetooth compatible module that delivers higher transmission efficiency and longer transmission distance. It enables more reliable wireless connectivity with standard Bluetooth devices. A large black gold heat sink provides efficient heat dissipation, supporting stable operation and helping prevent overheating during use. The unit includes a switch and a potentiometer for volume control, making it easy to adjust audio output. This design is especially suitable for DIY speaker projects where simple, accessible volume management is desired. The DC connector uses copper to handle current with minimal heat buildup, contributing to reliable power delivery. Key benefits and why you might need this product Improved wireless performance: higher transmission efficiency and longer range for stable Bluetooth connections. Reliable heat management: a large heat sink keeps the module cooler during operation. Easy volume control: a built in switch and potentiometer provide straightforward, tactile volume adjustment, ideal for DIY audio builds. Strong power handling: copper DC connector supports current with reduced heat, aiding performance and safety. Practical applications DIY Bluetooth speaker projects that require simple volume control and dependable wireless performance. Small home audio systems or amplifiers that need Bluetooth input and reliable cooling. Custom audio projects in cars or portable setups where a rugged DC power connection and easy volume adjustment are advantageous.