Description: 【Audio Module】: This product is a DIY MP3 decoding board, suitable for creating your own custom audio player or upgrading an existing device. It supports 3.5MM microphone and has a power output of 2X3W. 【Bt Enabled】: The Amplifier MP3 Decoding Board comes with built in BT and speaker functionality, allowing you to connect it to various devices for wireless audio stream and calls. 【Compact Size】: With dimensions of 70mmx22mm, this MP3 player audio module is compact and easy to install in various devices without taking up too much space. 【Durable Material】: Made from PC material, this MP3 Decoding Board is designed to be durable and long term, ensuring that it can withstand regular use without any decrease in performance. 【Versatile Use】: Whether you're building your own MP3 player or looking to enhance an existing device's audio capabilities, this module offers versatility and performance that makes it suitable for a wide range of applications.   Specification: Material: PC Size Chart: 70mmx22mm/2.76inchX0.87inch Package Includes: 1 MP3 BT Decoding Board Note: Please allow slightly errors due to manual measurement and different monitors.