Product introduction MH-M18/M28/M38 is a low-power Bluetooth design solution that supports the latest Bluetooth 4.2 transmission, two-channel stereo lossless playback, and Bluetooth wireless transmission when the module is connected to Bluetooth, which is very convenient. In an open environment, the Bluetooth connection distance can be up to 20 meters.Widely used in a variety of Bluetooth audio reception, a variety of audio DIY modification.For your different needs, we offer 3 versions for you to choose from: Function /Pin definition Bluetooth V4.2 version, support Bluetooth automatic connection technology, support WAV/WMA/FLAC/APE/MP3 lossless decoding, stereo dual channel output. After the module is powered on, the mobile phone searches for the Bluetooth name MH-M18/MH-M28/MH-M38, and can play music after connecting Bluetooth. module blue indicator light: When the Bluetooth is not connected, the indicator light flashes quickly; When the Bluetooth connection is on, the indicator light is always on; The following is an introduction to each version: MH-M28: Power supply: You can directly use the MICRO USB Android cable 5V for direct power supply, ...