specifications：
1.Support format：MP3 format or other source.
2.Power：DC12 CAR
3.Audio frequency plug：USB /2.5 audio gap
4.Transmitter frequency：87.7, 87.9,88.1,88.3,88.5,88.7,88.9MHZ
106.7,106.9,107.1,107.3,107.5,107.7,107.9MHZ
5.transmit distance：≥10m
6.frequency stability：±20ppm（-10℃+50℃）
7.stereo crosstalk：≥30dB（1000Hz）
8.frequency response：100-15000Hz