# Bluetooth 4.2 BLE audio module, stereo, MH-M28

- Page: https://sigmanortec.ro/en/bluetooth-42-ble-audio-module-stereo-mh-m28
- Price: 12.38 RON
- Availability: Out of stock
- Reference: 9062 · EAN: 5945623049560
- Category: Mechatronics and IoT > Sensors and Modules > Bluetooth Modules
- Package (shipping data): 0.005 kg
- Updated: 2026-09-14
- Shop: [Sigmanortec.ro](https://sigmanortec.ro/en/llms.txt)
- Prices: RON, VAT included; prices and stock as of 2026-10-22 03:39 (Europe/Bucharest)

## Description

Bluetooth 4.2 BLE audio module for stereo playback, ideal for DIY projects and active speakers, offers low consumption and stable connection up to 20 m in open space. It is powered by 5V via MicroUSB or 3.7-4.2V from a 1S battery, has audio output on the jack and supports WAV WMA FLAC APE MP3 lossless decoding. The connection is quick, the phone detects it and playback starts immediately.
Bluetooth 4.2 audio module, M28.
It is a module with low current consumption, supports the latest Bluetooth 4.2, two stereo channels for lossless playback. In open spaces, the distance reaches up to 20 meters.
This module has a MicroUSB connection for power and an audio jack
Lossless WAV/WMA/FLAC/APE/MP3 decoding support, dual channel stereo output.
After turning on the module, the phone searches for the MH-M28 device and can instantly play music.
The module can be powered directly from a 1S battery, but ATTENTION, there is no polarity protection, the wrong connection will destroy the module INSTANTLY. There is no dedicated charging circuit for the battery, even if the battery is charged once the module is connected to the USB or 5V power supply. WE RECOMMEND THE USE OF A SEPARATE CHARGING CIRCUIT FOR THE BATTERY.
Below you see the power circuit:
Specifications:
Supply voltage: 3.7 - 4.2V (via lithium battery) and 5V
Battery power pins: Battery plus to VBAT , battery minus to GND
Supported Bluetooth protocols: HFPV1.7, A2DPV1.2, AVRCPV1.5, AVCTPV1.2, AVDTPV1.2
Standby consumption: 5.5mA
Operating consumption: 20mA
Deep sleep consumption: 3uA
Button support: No
Volume and Mute adjustment: No
Dimensions mm: 45.2 x 20.2mm