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MICROPHONES, SPEAKPHONES, EARPHONES, LOUDSPEAKERS, EMERGENCY WARNING LIGHTS, ELECTRONIC HOME SECURITY SYSTEM COMPRISING GAS LEAKAGE DETECTING DEVICE, THEFT ALARMS, ANTI-INTRUSION ALARMS, FIRE ALARMS, SIRENS, SMOKE DETECTORS, FIRE SENSORS, GAS DETECTORS, TELEPHONES, TELEPHONE RECEIVERS, FAX MACHINES, RADIO PAGERS, SENSORS AND SWITCHES, namely, DETECTORS FOR DOOR AND WINDOW ENTRY, REMOTE CONTROLLERS FOR HOME SECURITY, ELECTRONIC DOOR OPENERS, ELECTRIC LOCKS, BATTERIES, AND BATTERY CHARGERS