... when the child or pet is immersed into any water (0-50m), the Base Unit will sound alarm ... at many areas, with its two perfect functions Water Immersion Alarm and Anti-Lost Alarm, it ... like private swimming pool, garden ponds, river side, sea water, beach, on boat, on street, on travel, ... pet.3) Suitable for any water including salt pool water.4) Rainproof and water-splash proof.5) Anti-drowning ...