Is it waterproof? I want to attach it to my swim buoy.

No. The back, where the wind chill chart is printed is poster board or some kind of heavy paper. That part is exposed and not waterproof.

I will be keeping my insulin in an insulated case with gel ice. Will this work in the case. I need to know temp of my insulin.

I have had this small temp gage for about 6 weeks .I pin this on my outside jacket pocket and walk 4 miles with it 6 days a week. This is not to expensive but moves around on the outside of my jacket pocket on my walk and still works great.I check it couple times a day and i think if its off maybe only 1 or 2 degrees if that. I am pleased with this temp Gage.

Brand	Sun Company
Item dimensions L x W x H	28 x 5 x 51 Millimeters
Global Trade Identification Number	00792758402006
Item Weight	0.01 Ounces
UPC	792758402006
Manufacturer	0
Country of Origin	USA
Model number	FB30-N
Specific Product Use	personal
Item Weight	0.28 g
Product Dimensions	2.8 x 0.51 x 5.08 cm; 0.28 g
Item model number	FB30-N
Item Height	5.08 Centimeters
Item Width	0.51 Centimeters
Power Source	Battery powered
Are batteries included?	No

SUN Original Zip-O-Gage - Zipperpull Thermometet For Jacket, Parka, Or Pack 402, White

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