Bluetooth 4.1 HW-771 MP3 Decoder Audio Receiver 5V Board with Controls TF Card for Car Speaker

The Bluetooth 4.1 HW-771 MP3 Decoder Audio Receiver Board enhances your car audio system with wireless streaming and MP3 playback capabilities. Featuring Bluetooth 4.1 technology, it ensures stable and high-quality audio transmission. The module supports MP3, WAV, APE, and FLAC playback from TF cards and USB drives, offering versatile audio sources. With onboard controls and compatibility with 5V power supplies, it is perfect for car speakers, DIY audio projects, and portable speaker setups. The module’s LED indicators and standard 3.5mm stereo output ensure convenient operation and integration.

Specifications:

• Bluetooth Version: 4.1
• Operating Voltage: DC 5V (Micro USB) or 3.7V-5V external power supply
• Audio Output: Stereo (3.5mm interface)
• Audio Formats Supported: MP3, WAV, APE, FLAC
• Input Interface: USB (U disk), TF card slot, Bluetooth
• Transmission Distance: Up to 10 meters (open space)
• Frequency Response: 20Hz – 20kHz
• Signal-to-Noise Ratio (SNR): ≥ 90dB
• Total Harmonic Distortion (THD): ≤ 0.1%
• Dimensions: 45mm x 40mm x 8mm (approx.)
• Weight: 12 grams (approx.)

Key Features:

1. Power Supply Options: Universal Micro USB 5V power supply and external 3.7V-5V power supply pad for flexibility.
2. Versatile Audio Inputs: Supports MP3, WAV, APE, and FLAC files from USB drives and TF cards, compatible with FAT16/32 file systems.
3. LED Indicators: Bluetooth mode indicated by a steady light, and music playback mode indicated by a flickering light.
4. 3.5mm Stereo Output: Standard interface for connecting headphones, amplifiers, and other devices.
5. Bluetooth 4.1 Technology: Ensures stable, high-quality wireless audio transmission with automatic re-link function.
6. Lossless Audio Decoding: Supports WAV, APE, FLAC, and MP3 lossless decoding for high-fidelity sound.
7. Onboard Controls: Includes buttons for mode switching, play/pause, next/volume up, previous/volume down, and mono/loop switch.
8. Automatic Mode Selection: Defaults to Bluetooth mode when no USB or TF card is inserted; switches to music mode when USB or TF card is detected.
9. Easy Bluetooth Pairing: Clear English voice prompts for pairing and connection status, identified as “HW-BT.”
10. File System Compatibility: Decodes files from U disk or TF card formatted in FAT16/FAT32 (not NTFS).

This versatile module is ideal for enhancing car audio systems, DIY projects, and portable speaker setups, providing high-quality wireless and MP3 playback with convenient control options.