Product Information: product description: Suitable for all types of vehicles. Digital tube display. Support QC3.0 fast charge. Support Huawei FCP Fast Charging Protocol/Samsung AFC Fast Charging Protocol/Qualcomm QC3.0/QC2.0 Fast Charging Protocol/Load 2.7V USB DCP on D+ and D-/Can provide the maximum 2.4A charging current for Apple devices/Compliant USB BC1.2 protocol, support USB DCP to short D+ and D-. Support stereo FM transmission technology. Support U disk playback. Support TF card music playback. Support WMA, MP3, WAV, APE, FLAC music format files. Automatic power-off memory function. Bluetooth supports A2DP, AVRCP, HFP, HSP. Bluetooth V5.0. Bluetooth hands-free calling. Support Bluetooth stereo music DSP technology. Battery voltage detection. Product parameters: Product net weight: 43g Product gross weight: 68g Product size: 5*4.5*8cm Packing size: 6.5*5.15*9.7cm Packing List: Product x1