1. Bluetooth version 5.02. Support calling ( and hold the pause button to answer the call when there is an incoming call)3. Supports recording. Recording only supports operation in TF mode or USB mode. the REC button to start recording, the REC button again to cancel recording and play the recording file; Exit recording mode by long pressing the pause button. When recording, it is necessary to connect a storage device, such as a USB flash drive or TF card4. Support power-off memory5. The power supply voltage supports between DC5V-12V and the current is around 0.5A. Not compatible with voltages below 5V.Model:-Y34B Without an amplifier, it cannot be directly connected to a speakerIt is not allowed to directly connect the speaker. It is necessary to connect the amplifier board before connecting the speaker for use.Supports song format MP3.Main functions: MP3/USB/TF/LINE IN/FM/BLUETOTH/remote controlDigital large color screen displayRadio FM frequency: 87.5-107.5 MHzKey Function Description:MODE: Switching between USB/TF/FM/AUX/BLUETOOL sound;USB: Connect USB flash drive (maximum support 32GB)TF: Connect TF storage card (maximum support 32GB)VOL-: Short to select the previous song; Long to decrease volumeVOL+: Short to select song; Long to increase volumeREPEAT: Short to switch between single and loopREC: Short to enter recording modeColor:BlackMaterial:plasticPackage Contents:1 * Decoder Board1 * Remote Control( Without 2 x AAA Battery)4 * CableOnly the above package content, other products are not included.Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.