Features: The audio cable needs to be purchased by yourself Product size: 46*46*13.5mm Bluetooth version: 5.0 Signal-to-noise ratio: 75db Bluetooth distance: Barrier-free 10 meters Frequency Response: 50Hz-20KHz Output interface: 3.5MM AUX OUT NIC sensitivity: -42db Support 5V/0.1A USB power supply Spring wire: support USB 5V100MA power supply 10m wireless transmission, supporting simultaneousBluetooth 5.0, built-in antenna design, can achieve obstacle-free signal transmission within 10 meters Lossless Music, Travel with you 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,WAV One-key answer , Hands-free calling Big button is more convenient and driving is safer Bluetooth 5.0, Navigation Voice Broadcast After 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. Power off memory playAutomatically reconnects at startup,memorizes frequency,songs restart after power off, The song started playing from the beginning when the power of Wireless Bluetooth 5.0 Smart ChipStable connection., Reduce signal interference, Smooth playback, Clear caling Product size: 4545X16MM Product Name: S-25 Car Bluetooth Receiver USB InputDc 5V/10omA Transmit Frequency : 87.5-108.0MHZ FM Transmission Distance : <5M Bluetooth Version : Bluetooth 5.0 Effective Distance : about 10M TF Capacity Expansion : 32G Audio Format: MP3/WAV/FLAC/APE/WMA Suitable for : For Apple/Android, etc Use of the Product Bluetooth connection 1. Insert the S-25 USB into the power port 2. Turn on Bluetooth and connect 3. Adjust the S-25 frequency to same as the car audio 4. Enjoy the music