Disclaimer: All GSM intercoms depend on a strong mobile network at the installation site to function reliably – using a mobile phone on the intended network held close to the exact mounting location can give you an indication: If you get 3-4 bars the intercom is likely to work reliably. 1 to 2 bars means you’re more likely to have reliability problems.
*Second Disclaimer all the intercoms listed in this are continually being revaluated and improved / revised and hence we cannot guarantee the accuracy of the info above. If you would like to discuss the features or practical applications of these units or anything else then please call and speak to our technical sales team