Infrared Alarm System (490-0330) Care and Maintenance Faxback Doc. # 17275 Your Radio Shack Infrared Alarm System is an example of superior design and craftsmanship. The following suggestions will help you care for your system so you can enjoy it for years. Keep the system dry. If it gets wet, wipe it dry. Liquids can corrode electronic circuits. Keep the system only in normal temperature environments. Temperature extremes can damage the system. Handle the system carefully. Dropping the system can damage it. Wipe the system with a cloth to clean it. If necessary, wet the cloth with water. Use only fresh batteries of the recommended size and type. Always remove old or weak batteries. They can leak chemicals that destroy electronic circuits. Modifying or tampering with the system's internal components can cause malfunctions and might invalidate your warranty. If your system is not performing as it should take it to your local Radio Shack store for assistance.