12-24V AC/DC Power
500 Phone User Memory
SMS Control and Programming
Any GSM Network (3 Mobile UK does not support GSM)
Good Audio Quality
This listing is for the ever popular Hello Systems GSM intercom. They are easy to install and set up by SMS. The intercom was internally redesigned in 2019 to improve the audio quality and signal strength.
These intercoms have always been really popular with installers due to the internal aerial which makes it much easier to install.
There is space in the memory for 500 numbers. They can be numbers to call or numbers who can dial in and open your gate.