WIFI:NoDSP:AC6826A DAC:AC6826A Dimensions (WxHxD):71 * 22 MM Body Material:plastic Bluetooth:Yes Supports EBook Reading:No Operation Mode:Touch Tone Storage Type:Flash Memory Have Speakers or not:Yes Supports FM:Yes Battery Specification:External Power Signal Noise Ratio:89dB Supports Recording Function:Yes Display Size:None Package:No Function:Voice Recorder,FM Radio,bluetooth,Build in Speaker Model Number:JQ-D102BT Style:Car MP3 Battery Life:> 20 hours Screen:No Balanced Out:No External Memory:No Audio Format Support:FLAC,ape,MP3,WAV,WMA Origin:Mainland China Certification:CE DC 5V 6W Amplifier MP3 Decoder Board 2*3W Bluetooth 5.0 Music Player USB Module FM AUX Radio Handsfree Call For Car Speaker 1. ON/OFF: power switch; 2. DC 5V: charging interface; 3. Switch indicator; 4. Microphone: call function; 5. USB: Connect U disk (maximum support 32GB); 6. VOL-: Short press is to select the previous song; long press is to decrease the volume; 7. PLAY/PAUSE: Short press is to switch between pause and play; long press is to switch between USB / TF / FM / LINE IN / BLUETOOTH, short press is to automatically search channels in the radio FM state; 8. VOL+: Short press is to select the next song; long press is to increase the volume; 9. TF: Connect TF memory card (maximum support 32GB); Bluetooth version: Bluetooth 5.0 With Bluetooth call function, power supply voltage is 5V, current requirement is above 2A Music format: MP3 / WMA / WAV / FLAC / APE lossless format music Power: 2*3W, connect 2 3W speakers Radio FM frequency: 87.5-107.5 MHZ Support function introduction: support MP3 / USB / TF / LINE IN / FM / BLUETOOTH / DC 5V About the structure: Panel size: 71 * 22 MM, the depth of the board is 26 MM, the distance between the two screw positioning holes is 59MM