Features:Bluetooth 5.0/Hands-free call/Voice Navigation.Support TF card playback (TF card needs to purchase by yourself)Audio Format Support MP3,WMA,APE,FLAC,WAVAfter turning on the phone, it automatically connects to the mobile phone's Bluetooth, which can make hands-free calls/navigation voice broadcasts and safty driving.Automatically reconnects at startup,memorizes frequency,songs restart after power off, The song started playing from the beginning when the power off.Stable connection., Reduce signal interference, Smooth playback, Clear calingSpecifications:Product size: 4.6*4.6*13.5cmBluetooth version: 5.0.Signal-to-noise ratio: 75dbBluetooth distance: Barrier-free 10 metersFrequency Response: 50Hz-20KHzOutput interface: 3.5MM AUX OUTNIC sensitivity: -42dbSupport 5V/0.1A USB power supplySpring wire: support USB 5V100MA power supplyNote:1. Due to manual measurement, please allow 1-3cm error. Make sure you don't mind before bidding.2. Due to the difference of different monitors, the picture may not reflect the actual color of the product. Thanks.Package List:1x Car bluetooth transmitterPacked safely in Retail box.