Ocean Signal HR1E Replacement Hydrostatic Release [701S-00608]Replacement Hydrostatic Replacement Hydrostatic Release mechanism for Ocean Signal Category I EPIRB's. Must be replaced every two (2) years from date of installation. Compatible With: Ocean Signal Category 1 EPIRB's *Sold as an Individual WARNING: This product can expose you to chemicals including di(2 ethylhexyl)phthalate (dehp) which is known to the State of California to cause cancer, birth defects or other reproductive harm. For more information