Specification: _x005f_x000D_ Origin: Mainland China _x005f_x000D_ Type: Voltage Regulator _x005f_x000D_ Condition: New _x005f_x000D_ Application: Speaker _x005f_x000D_ Supply Voltage: 3.7-5.5 V _x005f_x000D_ Model Number: MP3 Format Decoder Board _x005f_x000D_ Format: MP3 format _x005f_x000D_ Features: Auto-play on power up, red LED indicator updates when playing status _x005f_x000D_ USB stick: Support (tested 32G) _x005f_x000D_ TF card: Support (tested 16G) _x005f_x000D_ Playback mode: default TF card mode on power up, if TF card is not present automatically jump to U disk mode. Both devices are installed, you can set the playback mode manually _x005f_x000D_ Size: 45 x 36 x 13mm/1.8 x 1.4 x 0.5inch _x005f_x000D_ _x005f_x000D_ _x005f_x000D_ Note: _x005f_x000D_ Due to the different monitor and light effect, the actual color of the item might be slightly different from the color showed on the pictures. Thank you! _x005f_x000D_ Please allow 1-2cm measuring deviation due to manual measurement. _x005f_x000D_ _x005f_x000D_ _x005f_x000D_ _x005f_x000D_ Included: _x005f_x000D_ 1 x MP3 Format Decoder Board 1. Built-in Amplifier: Our MP3 format decoder board comes with a built-in amplifier, capable of delivering high-quality sound output up to 2W (or even higher up to 3W with 5V power supply), making it a great choice for anyone looking to enhance their audio experience. 2. Compatibility with Multiple Audio Input Formats: This decoding player amplifier board is compatible with TF cards and USB flash drives, allowing you to easily play your favorite MP3 files directly from your devices. 3. Easy to Use and Install: The power amplifier module is easy to use and install, with a 3.5mm gold-plated headphone jack that can be used to connect headphones or external speakers. The speaker terminal also allows for easy wiring without the need for soldering. 4. Convenient Power Options: With a MicroUSB power interface, you can use a phone data cable to power this audio player amplifier module with a mobile power bank or USB charger. Alternatively, you can use a 3.7V lithium battery or USB 5V power supply. 5. Compact Design: The MP3 decoding player voice amplifier module has a compact design, making it easy to use and store. It is designed to be convenient for modifying and upgrading various audio systems.