Features: 1. It has a Bluetooth connection password to prevent others from misconnecting. 2. Ultra-small size, easy to embed in modified products. 3. Two-channel stereo output, compatible with most power amplifiers, home audio and video, car audio and other equipment in the market4. Standard -MINI USB 5P interface, the same Android mobile phone charging port can be powered by mobile phone data cable. 5. The specific DIY embedded modification pins can be plugged and welded on their own circuit boards.6. High-fidelity output circuit, resistance-capacitance isolation, no noise, good sound quality7. Wirelessly insert U disk, memory card and key settings, pure mobile phone operation connection to play MP38. Equipped with 1 status pin, which can be used by professionals, such as combining single chip microcomputer and relay switch to realize music desk lamp.Supply voltage: DC 3.7-5VPower supply interface: -USB port or 2.54mil pin portLength, width and height: 3.3x3.5x1.1cmBluetooth name: BM3This batch of Bluetooth password: 1688 (you need to enter the password to connect, can not be modified)Communication distance: 3-12 meters (varies due to environmental obstacles)Support Bluetooth version: Support Bluetooth 4.1 or belowSupport mobile phone system: Android, systemChannel: two-channelAudio quality: MP3 lossless decodingBuilt-in amplifier: noneExternal power amplifier: does not limit the size of the external power amplifierPCB thickness: 1.6mmNeedle pitch: 2.54milColour: BlackMaterial: PCB, MetalApplication scenarios:1. Car audio modification, home audio modification2. Personal DIY Bluetooth audio, electronic project production3. Square dance sound, suburban sound modificationPackage Contents:2x Bluetooth Audio Receiver ModuleOnly the above package content, other products are not included.Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.