Honeywell iGSMV4G Internet and GSM Communicator with Two-way Voice Transport Capability Multi-GSM platform compatibility 2G, 3G and 4GAutomatic selection of the best available GSM network4G capable using HSPA+ protocol 256-bit AES Encryption Advanced encryption standard used for secure communications. Integration Quick and easy installation of GSM for VISTA and LYNX controls.Dynamic Signaling with Certain Honeywell Control Panels Programmable priority and delays determine signal path. Diagnostic LEDs Provide signal strength and status indications. QOS Quality of Service diagnostics via AlarmNet supply vital information including when a message was received, battery voltage, input voltage, signal strength and message path.