Bluetooth 4.2 Dual Channel 5W+5W Audio Amplifier Board DC 3.7V 5V Micro USB USB Sound Card DIY Bluetooth Speaker Modification Module

Product Description 100% brand new and high-quality Bluetooth audio amplifier module, integrates Bluetooth 4.2 receiver and Class D power amplifier, supports USB sound card function, plug and play without driver. Features stable connection, clear sound quality and compact size, perfect for upgrading idle speakers, modifying old audio devices and making DIY Bluetooth speakers.

Technical Specifications - Bluetooth Version: 4.2 - Device Name: DW-CT14+ - Operating Voltage: DC 3.7V-5V - Output Power: 5W×2 Stereo - Maximum Working Current: 5V/2A - Transmission Distance: 15 meters (open space) - Compatible Speakers: 2-8Ω, 3-10W (recommended 3Ω/5W or 4Ω/10W) - Product Size: 40×20mm - Material: Electronic components + PCB

Core Features - Compatible with all smartphones and Bluetooth adapters on the market - Supports automatic reconnection and auto-play for paired devices - Class D power amplifier, delivers clear and powerful sound quality - Built-in USB sound card function, driver-free plug and play - Compact design, easy to install in various small audio enclosures

Operation & Connection Guide 1. **Bluetooth Connection**: Turn on your phone's Bluetooth, scan for device "DW-CT14+" and click to connect 2. **USB Sound Card**: Connect to computer via Micro USB, automatically recognized as audio device (works with lithium battery power supply) 3. **Speaker Connection**: Connect left and right channel speakers to corresponding output terminals

⚠️ **CRITICAL SAFETY & USAGE WARNINGS** 1. **DO NOT** parallel the two amplifier outputs or connect them to negative electrode, this will permanently damage the amplifier chip 2. **Power Supply Requirements**:

- Use 3.7V lithium battery **WITH PROTECTION PLATE** or 5V/2A+ stable adapter only

- **DO NOT** use dry batteries, power banks, multifunction transformers or other unstable power sources

- Micro USB port is for charging and USB sound card only, **CANNOT be used as standalone power supply port** 3. This product adopts current-limiting charging mode **without charge management**, always use qualified lithium batteries with protection plates 4. Keep the Bluetooth antenna away from metal parts during installation to avoid reducing transmission distance

Package List 1 × Bluetooth 4.2 Dual Channel Amplifier Main Board 1 × Matching Connection Cable *Only the above items are included, other accessories shown in pictures are not included.*

Notes 1. Item color may have slight difference due to different monitor displays and lighting conditions. 2. Please allow ±1-2mm size deviation due to manual measurement.