PASSIVE SHELTER ANTENNA

The UPTP passive shelter antenna (repeater) is a rugged and tested device that was specially designed for maintaining emergency communication with external world while residing in civil defense shelters, underground / hardened facilities and other applications in which might be a difficulties for signals to pass the walls, metal structures or the ground around them.
The UPTP antenna designed to receive and reproduce signals like radio and mobile phone networks from the outside into the shelter and vice versa without connection to power source (no electricity required!).