3.5mm Jack connector  FM Radio Antenna  External Outdoor Audio Antenna for Mobile phone / Mini Speaker

Product Features:
3.5mm interface FM radio antenna, replacing the traditional headphone antenna .

Convenient, practical, good radio effect! Suitable for multiple brand models with FM radio
function plug-in speakers / mobile phones.
Product Parameters:
Color: black

Length: about 10.20cm/4.02"
Jack: 3.5mm Male
Gain: 5 dBi
Enhance the digital/analogue signal and strength signal quality
Easy to install
Gold plated connector for better signal transfer
Package including: External Antenna

Notice : Dear Sir , when you are  contacting  this antenna to 3g mobile  phone ,it will have no obvious change in signal display on the phone, but it will improve  when you are calling  to other people and test on the internet. Thank you.