1、It supports multiple ways of connection, Bluetooth, four ways to play music through memory card, U disk, 5mm audio cable, which can meet your different needs. 2、The USB charging port has a maximum output of 5V/1A, fast charging, and can read the U disk to play your favorite music, or charge mobile phones and laptops. 3、Insert the car cigarette lighter, select an empty FM frequency on the car radio, connect the bluetooth on the mobile phone, tablet to this adapter, and then adjust it to the same frequency to succeed. 4、After the pairing is successful, the mobile phone music is transferred to the car audio system. When there is an incoming call, it will automatically switch to the call mode, and the noise reduction technology makes the sound quality clear. 5、Supports hands free calling, seamless switching between incoming calls and music, one key answer, redial, hang up or reject a call. Built in microphone and noise suppression technology enable clearer hands free calls. 6、Suitable for 12V/24V car cigarette lighter socket. The low power bluetooth 1 chip makes the connection speed very fast, the signal reception is stable, and the anti‑interference performance is good. 7、Support a variety of bluetooth devices. Support the power off memory function, which can record the position of the song being played at the time, and continue to play when the power is restored. 1 x FM Transmitter1 x 3.5mm / 0.1in Audio Cable1 x Manual  Item Type: Bluetooth Earphone Material: ABS Model: S8Bluetooth Version: 4.1Rated Working Voltage: 12V-24VInterface: 1 x USB, 1 x Memory Card, 1 x 3.5mm / 0.1inSupport Memory Card, U Disk Capacity: ≤32GBAudio Format: MP3Support Bluetooth Protocol: HFP, HSP, OPP, A2DP, AVPCP, PBAPFM Transmission Distance: Approx. 5m / 16.4ftFM Frequency Range: 87.5-108MHzUSB Maximum Current Output: 5V/ 3.1A