Catalog > Consumer Electronics > Security & Alarms > Alarms > GSM Controllers Ultra 4G GSM Intercom Kit Ultra 4G GSM Intercom Kit CEN GSPU4GK102V3 CENTURION G-SPEAK ULTRA 4G GSM INTERCOM KIT Discontinued Specifications, Prices & Availability may change without notice. Images are for illustration purposes only. E&OE Overview The G-SPEAK ULTRA promotes the ultimate in convenience and peace of mind by combining wireless GSM technology with CENTURION’s futuristic and stylish ULTRA interface. ADVANCED 4G GSM-BASED INTERCOM SYSTEM Answer your intercom from anywhere in the world for maximum security andconvenience.