ALCON CT-7 SS Phone line and intercom transfer system up to 20km NLOS Is a simple and reliable solution for transfer your phone lend-line (PSTN) , Intercom, VoIP signal, Fax, PBX extension or GSM Extension Below range is result of our test and match real life performance: Range without line of sight is up to 20km. Max Range in line of sight is up to 30 km Works on any analog line port (PBX, VOIP, PSTN, FXS or POTS) No software setup / easy installation The line of sight is not necessary for range Reliable and simple to use Up to 4 Remote Units or portable Handsets per one base 5 W Base unit 5 W Remote unit Universal interface on the remote unit for phone, fax, data or other telecom equipment use Intercom connection between base and remote or portable handsets Economical and easy to use Excellent signal quality for long range use RF stability & durability Scrambler function 40 channels frequency auto scan Two-way paging & intercom Remote and base units can operate by 12V car battery and it is easy to use with Solar panel + 12V battery without any problem. The standard power supply is 12V 2A Security: Multiple Channel Access: 40 channels automatic scan to avoid interference Built-in voice security circuit (Scrambler). Works on two frequencies in the same time : 382.100MHz / 256.100MHz