Features:Transmits Phone Call & Audio Streaming to the Car FM Stereo System via wirelessSwitch to Hands-free Mode Automatically from Music Streaming Status when Receiving Phone Call.Action wireless 5.0 for Crystal Clear Sound QualityWith one Button to activate BassThree Outputs 41W (5V/1A+QC3.0 18W max and Type-c 18W max)Competitive size to flush fit your 12V/24V outletWith Over Voltage, temperature, current protection and short circuit protectionWith elegant LED screen to display numbers.Detect and display the voltage of Car Battery when power onSupports last call redialSpecificationswireless version: V5.0wireless Protocol: AVRCP, HFP, A2DPLED display dimensions: 18*6mmFM frequency: 88.1-107.9MHZFrequency stability: 10ppmProduct Input: 12-24VCharger output: 5V/1A+PD 18W + QC3.0, total 41WMusic Format: MP3 WMA WAV FLACwireless Distance: about 5 mProduct Weight: 41gProduct Dimensions: 96.3*32*42.2mmMaterial: ABS Shell