ShieldPro Ultimate Humidity Indicator Cards - 6-Dot Reversible Silica Gel Desiccant Cards (4x1 Inch)

Keep an eye on moisture levels with these ShieldPro humidity indicator cards.

They're super handy for any storage container, safe, or electronics box.

Each card has six reversible dots that change color to show you the relative humidity at a glance.

When they're dry, they're blue; when they get wet, they turn pink.

Simple as that.

They're brand new and come in their original packaging.

Just toss one in with your gear, and you'll always know if things are staying dry.

Each card measures 4 inches by 1 inch.

Easy, cheap, and effective protection against moisture damage.