If you are looking for a basic alerting system, check out Sonic Alert's HomeAware system. This receiver is the primary piece of technology you need to gather alerts from other HomeAware sensors - for doors, phones, and other objects. Even get a alert from your smart phone.
• Bright flashing LED icons
• Different flash patterns for each alert sent
• Adds an additional 1,000 feet of range to the HA360M Main Unit
• Battery backup (3 AA batteries not included)