Transform your audio devices with this versatile DIY Audio Receiver Board, designed to upgrade ordinary speakers or headphones into high-end Bluetooth-enabled wireless audio systems. Supporting Bluetooth 3.0, 4.0, and 4.1 specifications, this board offers seamless wireless music reception, USB and TF card playback, AUX input, and customizable EQ sound effects, delivering rich and dynamic audio performance for any audio project. Key Features: · Multi-Functional Audio Connectivity: Supports Bluetooth wireless audio streaming, USB and TF card music playback, and 3.5mm AUX input, providing a wide range of playback options. · Bluetooth Compatibility: Compatible with Bluetooth 3.0, 4.0, and 4.1 standards, enabling easy pairing with most Bluetooth-enabled devices for reliable wireless audio transmission. · Hands-Free Calling Support: Incorporates HSP and HFP profiles, allowing voice communication and call management directly through connected devices. · Advanced Bluetooth Protocols: Supports SPP protocol communication for Android app integration, as well as L2CAP/A2DP (AVCTP/AVDTP/AVRCP) for full audio control and music operation. · User-Friendly Operation Modes: Simple mode switching between Bluetooth, AUX, USB, and TF card playback via dedicated MODE button. Supports automatic reconnection, low power consumption modes including sniff and stop mode. · High-Quality Audio Output: Includes 3.5mm stereo headphone output (16-64 ohm impedance) for enhanced bass and powerful sound, plus left/right audio output sockets (LOUT/ROUT) designed for speaker modifications. · Wide Format Support: Built-in MP3 chip supports decoding of WMA, MP3, and WAV formats on TF cards (up to 32GB) and USB flash drives (up to 64GB). · Customizable EQ Settings: Offers selectable equalizer presets including flat, rock, classical, jazz, and more for tailored audio experiences. · Extensive Interface Options: Equipped with multiple interfaces including micro USB charging (5V), microphone input for hands-free calling, stereo AUX input, and button expansion port for easy control customization. Specifications: · Item Type: Audio Receiver Board · Power Supply: 5V via Micro USB charging interface · Audio Outputs: 3.5mm stereo headphone jack, LOUT/ROUT audio output sockets · Audio Inputs: 3.5mm AUX input, INL/INR stereo audio input sockets · Supported Bluetooth Versions: 3.0, 4.0, 4.1 · Supported Audio Formats: WMA, MP3, WAV · USB Flash Drive Support: Up to 64GB · TF Card Support: Up to 32GB · EQ Modes: Flat, Rock, Classical, Jazz Package Includes: · 1 x DIY Audio Receiver Board This DIY Audio Receiver Board is a perfect solution for audio enthusiasts looking to innovate and enhance speaker or headphone functionality with wireless Bluetooth streaming, versatile playback options, and voice communication features. Its comprehensive input/output interfaces and EQ customization offer a professional-grade audio upgrade suitable for various audio modification projects.