Description: Support Bluetooth/U disk: U disk plug and play, adjust the car radio frequency and Bluetooth MP3 frequency to be consistent songs. Universal for Android/IOS: unlimited mobile phones and models, applicable to mainstream 12V-24V models on the market, compatible with a large number of apps charge: 3.1A dual USB charge, dual USB ports can be charged at the same time, up to 3.1A, mobile phones be charged at the same time. Safe and stable/Smart Bluetooth 5.0: a new generation of chips responds quickly, constant temperature and steady current charging, no harm, making charging safer Memory function: memory playback function, automatic reconnection after , memory frequency, restart after the song is powered off, and start playing from the first sentence of the disconnected song Specification: Working voltage: 12V-24V Input current: 3.1A Display screen: blue digital display Transmission efficiency: 87.5-108 Mhz Effective distance: about 10.5 meters Bluetooth version: Bluetooth 5.0 Support expansion: U disk ≤ 32G Launch distance: