Features: Three Ports: This adapter has three ports for charging fast charging current protection and does not damage electronic devices. Bluetooth-compatible 5.0 Chip: The Bluetooth-compatible 5.0 chip is compatible with earlier versions and is intended for low-power devices while maintaining high-speed transmission. FM Frequency Modulation: Adjust the frequency of the car radio to the local frequency point where there is no radio station and then adjust the frequency of S-21A to match the frequency of the car radio. Widely Used: Suitable for mobile phones or tablets such as for iPhone forHuawei forSamsung forXiaomi and other electronic devices. After-sales Service: If you have any problem please contact us immediately we will help you solve it as soon as possible. Specifications: Material: ABS Working Voltage: DC 12-24V Transmission Frequency: 5m Bluetooth-compatible Version: 5.0 Bluetooth-compatibleTransmission Distance: 10m TF Card /USB Flash Drive 32G Application: For Cars of 12V - 24V Notes: Please note that due to the influence of light and screen slight chromatic aberration is acceptable. Please allow slight measurement error due to manual measurement. includes: 1 *Car MP3 Player "