Main functions: 1. Dual decoding supports music in MP3 /WMA/WAV/FLAC/APE formats. 2. Support Bluetooth call function and recording function; 3. Equipped with a power amplifier of 2*3W/5W, it can simultaneously operate two 3W/5W speakers. 4. Supports TF card interface and USB interface (USB flash drive); 5. Support external audio source input LINE IN; 6. Supports FM radio reception, with a frequency range of 87.5MHZ-108.0MHZ. 7. Buttons: Three-button multi-directional control, VOL-/ AUTO/VOL+ /MODE; 8. With charging function Detailed key operation: 1. OFF/ON: When the switch is in the OFF position, it is off; when it is in the ON position, it is on. 2. VOL- Key (Previous song/Volume Down) : In MP3 mode, a short press of VOL- is the previous song, and a long press is the volume down. In FM mode, a short press increases the channel number by one. In the Bluetooth function, a short press will play a song on Bluetooth, and a long press will reduce the volume. 3. AUTO button (Play/Pause) : In MP3 mode, a short press of AUTO activates play/pause. In FM mode, a short press will play/pause, and a short press will automatically end and save the channel. Short press to play/pause under the Bluetooth function; 4. VOL+ Key (Next track/Volume Up) : In MP3 mode, a short press of VOL+ is for the next track, and a long press is for volume up. In FM mode, a short press reduces the channel number by one. In the Bluetooth function, a short press is for the next song of Bluetooth, and a long press is for increasing the volume. 5. MODE button: It is used to switch successively among USB/TF/FM/audio input LINE/Bluetooth functions. Long press is the recording function Specifications: Material: Plastic Size: As picture Packaging: 1 Piece Note: 1. The color of the item may be slightly different from the pictures shown on website caused by many factors such as brightness of your monitor and light brightness. Please refer to the actual product received. 2. Please allow slight manual measurement deviation for the data.