Wetnotes Deluxe Swivel When the battery level becomes

When the battery level becomes low

which enables precise adding of the gas to the buoyancy compensator

additionally

Green Viton O-ring

The SEAL SL:01 combines extreme reliability

Wetnotes Deluxe Swivel When the battery level becomesHighland Deluxe Wet Notes are an invaluable tool for technical, scientific and recreational divers alike. They allow you to display your dive plan, record your findings, draw your observations and communicate with your buddy. They are compact, convenient and easy to use. 23 blank, 2 sided wet pages, 2 blank slates Clear, exterior pocket to accommodate slate(s) Bungee, attachment lanyard Elastic bookmark Slots for additional pencils Clear pocket inside