No range limits at all.
Rings multiple numbers when the call button is pressed, so if you are not at home, you can receive a call on your mobile and grant access to your visitor.
Access control built in by telephone number recognition. Program in your friends and family numbers so that they can simply "ring your gate" to gain access".
No need for handsets inside your house, no cabling, no damage to decor!
Based on the GSM-1000 module with SRS front panel.
