The Ocean Signal ARH100 is a fully weatherproof exterior housing designed for the Ocean Signal E100 and E100G models of EPIRB. ARH100 Automatic Release Housing is manufactured in a durable and highly UV stable plastic and provides excellent protection of the unit until it is required. The integral Hydrostatic Release unit will automatically realease the EPIRB should the vessel be run-down, capsize or sink suddenly. The EPIRB will then float to the surface and begin to transmit automatically.