Earthquake Sensor Alarm. When seconds count, the Quake Alarm is there for you!
This seismic alarm earthquake detector is designed to provide instant warning of seismic activity by sensing the actual P-wave of the quake.
Sensor detects earthquakes many miles away and also monitors aftershocks.
Quake Alarms consistently outperformed on research and development tests.
Alarm uses 9 volt battery (not included).