AC-ODC. The Yale AC-ODC is an outdoor contact accessory for the Yale Sync alarm range and is used to monitor outdoor entrances and exits such as gates outside your home. It has a 200m read range and a 10 year battery life. The powerful magnet will tolerate wide gaps and the unit is tamper proof.. IP66 rated. Use on outdoor gates, entries or exits. 200mm range. 10 year battery life