This decoder board can be directly connected to speakers, it also has power amplifier and decoding functions, and supports bluetooth-compatible connection, which is very convenient to use. In addition, it supports U disk or TF card, supports calls, supports recording, but recording only supports operation in TF mode or USB mode, and can switch between MP3/USB/TF/LINE IN/FM/BLUETOOTH and other modes. Made of high-quality plastic material, it is safe and durable for long-term use. The length of the product is 8.9cm and the width is 2.4cm. Suitable for car, auto, home, office,etc. Item Name: Decoder Material:Plastic,Electronic Component Batteries: The Battery Used in the Remote Control is a Button Battery(Battery Not Included) Supply Voltage: DC6V-12V Output Power: 50W (2*25W) Working Current: The Current is Between 1-3A Bluetooth Version: 5.0 Supporting Functions: Support Calls (Long Press the Pause Button to Answer the Call when There is an Incoming Call), Support Recording, But Recording only Supports Operation in TF Mode or USB Mode. (Long Press the MODE Button to Start Recording, Long Press the MODE Button Again to Cancel the Recording and Play the Record Support Format: Supported Music Formats include MP3/WMA/WAV/APE/FLAC Size:8.9cmx2.4cmx2.4cm/3.5inx0.94inx0.94in Notes: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Package Includes: 1 X Decoder 1 X Remote Control (Battery Not Included) Have a great time shopping!