Feature: 1. Function: Bluetooth-compatible version 5.0. Support calling (long press the pause button to answer the call when there is an incoming call). Recording only supports operation in TF mode or USB mode. When recording, you need to connect a storage device, such as a U disk or TF card. Support power-off memory. The power supply voltage supports DC 7V-22V, and the current is between 1-4A. Can be directly connected to speakers. 2. Supported song formats: MP3/WMA/WAV/APE/FLAC. 3. Main functions: MP3/USB/TF/LINE IN/FM/BLUETOOTH-compatible/remote control. 4. Power: The power is 100W, the product has a power amplifier, supports balanced output, and the stereo power is 2*50W. 5. Support folder selection and playback: When there is a folder in the device and there are songs in the folder during USB or TF playback, press the previous button or the next button twice to select the folder to play songs, and the screen will display F001-F00 accordingly, and so on, if there are several folders, several F00s will be displayed. Support USB/TF/Bluetooth-compatible/Radio/AUX automatic switching. Specification: Origin: Mainland China Certification: CE Audio Format Support: mp3,WAV,WMA,APE,FLAC External Memory: Yes Balanced Out: Yes Screen: Yes Model Number: Decoder board Function: Voice Recorder Package: Yes Supports Recording Function: Yes Bluetooth-compatible: Yes Name: Bluetooth-compatible decoder board with color screen Model: Y04 Color: Black Remote control: Large, silicone, small (optional) Power supply: 7V-22V Power: 2*50W stereo Signal-to-noise ratio: ≥70dB Radio frequency range: 87.5-108MHz Output Power: 1. 2*50W(VDD=22V,RL=4Ω) 2. 2*30W(VDD=12V,RL=4Ω) Size: 112x61x17.3mm/4.41x2.4x0.68in Weight: Large remote control 80g, silicone remote control 70g, small remote control 60g Button function description: "PREV/VOL-" long press the decrease volume button; in USB/TF/Bluetooth-compatible/radio mode, short press to previous song/previous station "PLAY/PAU" in USB/TF/Bluetooth-compatible mode is short press to play/pause; long press is mode switch "NEXT/VOL+" long press the increase volume button; in USB/TF/Bluetooth-compatible/radio mode, short press for next song/next station "MODE" is the mode switch, a total of 5 modes (Bluetooth-compatible-TF-USB-FM-AUX). Note: 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! Please allow 1-2cm measuring deviation due to manual measurement.