400mm Radio Only Pole Antenna
![](http://www.infac.com/sites/default/files/7.-400mm.png)
It is an active external antenna for a car that has a shortened pole length and a built-in low noise amplifier to improve reception performance compared to a basic (passive) antenna for receiving radio (AM / FM) signals.
Pole length is 400mm, which improves reception performance and is applied to commercial vehicles.
![](http://www.infac.com/sites/default/files/400mm_Micro_Pole_Antenna_1.jpg)