Packing List: 1 * Car FM transmitter 1 * Aux cable 1 * English user manual Features: Bluetooth version 4.0/2.0, support Bluetooth call, Bluetooth music transmission, caller number. Support TF Card 1 U disc player and card reader function, support MP3/WMA format music. Double USB charging port 2.1A can expand the portable device function, suitable for all mobile phone, tablet and other electronic products charge. 1.3/1.2 Inch LED dot matrix screen, display frequency point, file name, and working state information. Support one key menu setting language, playback mode, and sound mode. Support power failure memory and folder playback. AUX input and output function. One button switch, pause, listen / Hang 1 listen/ down key9. FM emission frequency 87.5-108.0MHZ. BT08: Specifications: Colour: Black Material: ABS Screen: 1.3 inches Bluetooth Version: V4.0/2.0 + EDR Bluetooth Voice Processing: A2DP FM Frequency: 87.5-108 MHZ Audio format: MP3/WMA Support Bluetooth Protocol: HFP/HSP, A2DP Bluetooth Effective Distance: 10m Microphone: Yes. Microphone Effective Distance: 0.5-2M USB interface: 2 USB Output: 5V 2.1A Input voltage: DC 12-24V Maximum support extensions: TF/64GB, USB/128GB Product size: 122*98*45mm BT06: Specifications: Colour: Black Material: ABS Screen: 1.2 inches Bluetooth Version: V4.0/V2.0 + EDR(optional) Bluetooth Voice Processing: A2DP FM Frequency: 87.5-108 MHZ Audio format: MP3/WMA Support Bluetooth Protocol: HFP/HSP, A2DP Bluetooth Effective Distance: 10m Microphone: Yes. Microphone Effective Distance: 0.5-2M USB interface: 2 USB Output: 5V 2.1A+1A Input voltage: DC 12-24V Maximum support extensions: TF/64GB, USB/128GB Product size: 130*100*35mm