CARE
Keep the CID dry; if it gets wet, wipe it dry immediately. Use and store the CID only in normal temperature environments.
Handle the CID carefully; do not drop it. Keep the CID away from dust and dirt, and wipe it with a damp cloth occasionally to keep it looking new.
Modifying or tampering with the CID’s internal components can cause a malfunction and might invalidate its warranty and void your FCC authorization to operate it. If your CID is not performing as it should, take it to your local RadioShack store for assistance. If the trouble is affecting the telephone lines, the phone company can ask you to disconnect your CID until you have resolved the problem.