Bluetooth 4.0 Audio A2DP Stereo Module 3.7V-5V microUSB VHM-314 Jack 3.5mm

Bluetooth 4.0 Audio A2DP Stereo Module VHM-314

VHM-314 Bluetooth stereo audio module is a proven circuit for wireless music transmission. Thanks to support for audio profiles such as A2DP and the Bluetooth 4.0 BLE standard, it ensures a stable connection and clear sound. The board is powered by voltages from 3.7V to 5V, which allows use of a microUSB connector or direct connection of a Li-Ion cell. The 3.5mm jack line output enables seamless integration with many audio systems. The product is ideal for electronics projects, including with Arduino, ESP8266, ESP32, and Raspberry Pi.

Key technical specifications

The module features a well-thought-out design and easy wiring. The most important technical parameters are:

• Supply voltage: 3.7V - 5V
• Communication standard: Bluetooth 4.0 BLE
• Output connector: Jack 3.5mm
• Power connector: microUSB
• Supported profiles: A2DP, AVCTP, AVDTP, AVRCP, HFP
• Signal-to-noise ratio (SNR): 90dB
• Total harmonic distortion (THD+N): -70dB
• Dynamic range (DNR): 91dB
• Board dimensions: 30mm x 30mm x 7mm

Example applications

1. Wireless speakers: Adding Bluetooth playback from a smartphone to conventional speakers.
2. Audio equipment upgrades: Extending older stereo systems and Hi-Fi setups with wireless audio.
3. In-car audio: Streaming music to a car radio equipped with an AUX input.
4. DIY projects: Building custom portable speakers using microcontrollers.
5. Headphone receiver: Turning wired headphone models into wireless ones.

Benefits of choosing the VHM-314 module

• Versatile power: Operation at 3.7V from Li-Ion cells or 5V from USB power supplies.
• High sound quality: A2DP profile support delivers clean sound with negligible latency.
• Easy installation: Compact size fits almost any enclosure.
• Broad compatibility: Works with smartphones, tablets, and Bluetooth-enabled computers.
• Ready to use: Integrated 3.5mm Jack socket eliminates the need to solder extra audio connectors.