Safety is key! This low air alarm designed for surface air supplied dives provides an audible and visual notice if pressure falls below 90 PSI to alert your tender and/or captain that something may be wrong. This quick notification allows precious time to respond and move your divers over to a backup air supply until the issue is resolved. The alarm will continue to sound until pressure returns to 115 psi or you turn it off. Comes with 10′ of wire to mount sensor and 10′ of wire to connect to your 9V system. You can easily extend wiring yourself or contact us for pricing to add additional wire.