MH-MX8 MP3 Decoder Board Bluetooth BLT 4.2 mp3 Lossless Decoder board Stereo DIY Kit M18 M28 M38

# Product Introduction 

## Features of M28 

- Supports MICRO power supply, audio headphone interface, and lithium battery power supply 

- Does not support built-in power amplifier, USB sound card driver-free, volume memory/adjustment, MUTE mute interface, and key expansion 

- Bluetooth and format-related parameters are the same as those of M18/M38 

- Working voltage: 5V/3.7V - 4.2V 

- Power consumption: 

  - Unconnected broadcasting state: 5.5MA 

  - Connected working state: 20MA 

  - Deep sleep: 3UA 

- Transmission distance: 20 meters (in an open and low-interference environment) 

- Working temperature: -40°C to +85°C 

- Sensitivity: -87dbm 

The MH-M18/M28/M38 adopts a low-power Bluetooth design solution, supporting Bluetooth 4.2 transmission and enabling dual-channel stereo lossless playback. After the module is connected to Bluetooth, it can quickly achieve Bluetooth wireless transmission. In an open environment, the Bluetooth connection distance can reach 20 meters. 

This product is widely applicable to various Bluetooth audio reception scenarios and audio DIY modification needs. 

To meet different usage requirements, 3 versions are available, and the functional differences of each version are as follows: 

## Features of M18 

- Does not support MICRO power supply, audio headphone interface, and USB sound card driver-free function 

- Supports lithium battery power supply, volume memory/adjustment, MUTE mute interface, and key expansion 

- The Bluetooth version and supported protocols are common with M28/M38 (Bluetooth 4.2, supporting protocols such as HFPV1.7, A2DPV1.2) 

- Format supports WAV/WMA/FLAC/APE/MP3 lossless decoding and stereo dual-channel output 

## Features of M38 

- Supports MICRO power supply, lithium battery power supply, USB sound card driver-free, and has a built-in 5W + 5W power amplifier 

- Does not support audio headphone interface, volume memory/adjustment, MUTE mute interface, and key expansion 

- General parameters such as Bluetooth and format are the same as those of M18/M28 

- Power consumption, transmission distance, working temperature and humidity, and sensitivity are also the same as M28