VDR V-3900BT 5 inch box audio MP3 FMRadio Bluetooth Specs Music Format Support : MPEG Layer-3 (MP3) Playback Audio Line Input : Available (Mini-Stereo Male 3,5mm to RCA Male Audio Port, Cable Not Included) Memory Card Support : Micro SD (TF Card) Media USB Flashdisk Support : Available Remote Control : Available Radio FM : Available Speaker Unit : 5″ Power input : AC 220V 50Hz, DC 12V (Cable Included) Size : 5″ Power : 20 Watt Voltage : AC 110 – 240V DC 12 – 24V Tweeter : Yes Frequency : 100 – 10000Hz Bluetooth : 4.2 Mp3 : Yes Radio : Yes USB : Yes SD / TF Card : Yes AUX in : Yes L / R Audio in : Yes Mic in : No Remote : Yes