It is only used in your car to transmit audio to your car audio from you phone or tablet PC.
Easy to use:
Plug the transmitter into a cell phone or other device, and set the transmitter to the same channel as the car radio.
Specifications:
Brand: Earldom
Model: FM-M13
Material: ABS
Input: 5V 600mA
Plug: 3.5mm
Effective Range: 3-5m
Frequency Response: 20-20K Hz
Emission Frequency: 87.5-108.0 MHz
Package Include:
1x Earldom 3.5mm Car Kit FM MP3 Audio Transmitter for iPhone Samsung Xiaomi
1x Charging Cable