Respicefinem MH MX8 Module for Bluetooth Audio Receiver Board Lossless Decoder Kit M18 M28 M38 (M38 with 5W Amplifier Version)

Description

• Control Function: The module features a control terminal designed to manage the power amplifier board. When in mode, the terminal outputs a high of 3.3V, and switches to a low during playback, providing convenient control over your setup. This function integrates seamlessly with compatible power amplifier boards for enhanced usability.
• Key & Volume Control: The key control requires additional connection of resistors and buttons to enable volume adjustment and power-off functions. By default, the output is set to 100% volume. pressing the allows you to increase or decrease the volume. If the controlled volume is below 15%, the output will remain at 15% after powering on, ensuring consistent levels.
• Versatile Power Supply Options: Both M28 and M38 modules offer flexible power solutions: they can be powered via a USB cable (5V), a 5V power supply, or a 3.7V lithium battery. The M38 module, with a maximum working current of 5V 2A, performs best with a 5V 2A regulated power supply for optimal sound quality.
• Flexible Output & USB Sound Card Support: The 3.5mm interface allows direct connection to headphones or wiring to a power amplifier board for expanded setups. The M38 module also supports USB sound card functionality. simply connect it to a computer via a USB cable for plug-and-play music playback through the modules amplifier output.
• 4.2 & Lossless Decoding: Equipped with V4.2 technology, the module supports automatic connection. It decodes lossless formats including WAV, WMA, FLAC, APE, and MP3. After powering on, search for the name MH-, MH-M28, or MH-M38 on your phone, connect, and start playing music instantly

Item Type: Module
Function / model M18 M28 M38
MICRO power supply No Yes Yes
Audio headphone Interface No Yes No
Built-in amplifier No No Yes(5W+5W)
Lithium battery powered Yes Yes Yes
Support USB sound card, drive No No Yes
Volume memory/adjustment Yes No No
MUTE mute interface Yes No No
Button extension Yes No No
for Bluetooth version For Bluetooch V4.2
Support for Bluetooth protocol HFPV1.7, A2DPV1.2, AVRCPV1.5, AVCTPV1.2, AVDTPV1.2
Format support Support WAV/WMA/FLAC/APE/MP3 un-decoded, stereo two-channel output
Operating Voltage 5V/3.7V-4.2V
Not connected Broadcast state 5.5MA
Connection work state 20MA
Deep sleeping 3UA
Transmission distance 20 meters (empty or low interference environment)
Operating temperature -40C to +85C
Sensitivity -87dbm
MH-M18:
Number Pin Description
1 KEY Button control terminal (4 button functions, additional required)
2 MUTE Mute control terminal (output high level 3.3V when muting, output low level during playback)
3 VCC Positive power supply 5V (lithium battery 3.7V power supply requires short circuit diode)
4 GND Negative power supply
5 L Left channel output
6 R Right channel output

MH-M38:
Number Pin Description
1 5V Power positive 5V
2 GND Negative power supply
3 VBAT Lithium battery positive 3.7-4.2V
4 L+/L- Left channel output (direct speaker)
5 R+/R- Right channel output (direct speaker)

Blue Module:
The light blinks when for Bluetooth is not connected
The indicator light usually lights up when for Bluetooth is connected
For Bluetooth appears during playback, slow flashing

Package List
1 x Moduleor
1 x Module
2 x Female Connector
2 x Male Connector

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