Features: *USB3.1A, battery voltage detection *Support BT music/TF card/U disk playback, support BT hands-free call *Support power off memory function *2 mobile phones charge at the same time, support charging while listening to song *Noise cancellation function, built-in noise cancellation circuit, make the call sound clearer Specification: USB output: 3.1A Memory card type: U disk Support U disk capacity: ≤32GB Power supply: DC12-24V Support file type: MP3/WMA/APE/FLAC FM frequency range: 87.5-108MHz Signal to noise ratio: 85db (FM: 65db) Harmonic distortion: 0.05% FM: 0.1%) Working temperature: 0℃-60℃ Suitable models: DC12V -24V car general Package included: 1pc * BT Fm modulator