What's in the box:

1 X 1.44 Inches Screen Multi-functional Car Wireless FM Transmitter USB Car Charger Wireless Car Kit with Audio MP3 Player Support TF Card (Black), Black

This multi-functional car FM Transmitter can be used as a car MP3 player to play music and a hands-free calling system. Thus, it can provide you the enjoyment of listening to music, ensuring your driving safety while enjoying music. Besides, it can be used as a car charger. With 5V/2.1A charging port, it can give you a fast and effective charging experience.

Features:
1.44 inches large screen is allowed to display clearly.
Support car battery voltage display, which allows you to monitor the battery at any time.
Noise is suppressed by CVC technology to provide clear sound quality.
Support an external TF card, which can play music files in MP3 and WMA format.
Support providing powers to other devices; the maximum output is up to 5V/2.1A.
Support hands-free answer, hang up, reject and redial.
Support charging intelligent recognition.

Specifications:
Material: ABS
BT version: V3.0 + EDR
BT sound processing: A2DP (Advance Audio Distribution Profile) function support
Effective BT Range: 10m
Format supported: MP3, WAV,WMA
FM frequency: 87.5MHz-108.0MHZ
Working voltage: 10V-24V
Audio input/output: 3.5mm audio interface
USB charging port: 5V/2.1A
Item weight: 78g / 2.75oz
Package size: 16.3 * 12.5 * 5.4cm / 6.42 * 4.92 * 2.12in
Package weight: 172g / 6.07oz

Note:
This device is compatible with most mobile phone, except a few mobile phones that are not avaliable to use parts of above functions.

Package List:
1 * Car Wireless FM Transmitter
1 * Audio Cable
1 * User Manual