I bought a Coghlan's 4-Function Survival whistle at Wal-Mart a while back. It cost me about $5.00 CAN, which is about $3.30 US.
It consists mainly of a black plastic pea-less whistle. On top is a button compass with a luminious face. On back is a thermometer with a range from 50 C (120 F) to -20 C (about 0 F.) And, folding out at the back is a magnifying lens.
Comparing the compass to my trusty Suunto, I noticed it was a few degrees off. I soon realized this was a result of the metal key ring attachment hooked through a hole at the end of the whistle. One removed, it pointed true.
The whistle has an arrow pointing the length of it that, when line up with the compass, makes for eariser navigation.
The whistle is extremely loud, as least enough to cause my sister not to speak to me for a while after blowing it in her presence. One short toot gives you the feeling in your ears you get after being at a rock concert for, say, 1/2 an hour to an hour.
The thermometer appears to be accurate, and the lens is a typical plastic type. Overall construction appears to be fairly solid.
To test it today, I stuck it in the freezer. After an hour at approx. -15 C (7 F?), the compass still spun freely, and the whistle blew fine.
Overall, I think this is a neat little product and will probably buy a few more for the rest of the family in the future.
It consists mainly of a black plastic pea-less whistle. On top is a button compass with a luminious face. On back is a thermometer with a range from 50 C (120 F) to -20 C (about 0 F.) And, folding out at the back is a magnifying lens.
Comparing the compass to my trusty Suunto, I noticed it was a few degrees off. I soon realized this was a result of the metal key ring attachment hooked through a hole at the end of the whistle. One removed, it pointed true.
The whistle has an arrow pointing the length of it that, when line up with the compass, makes for eariser navigation.
The whistle is extremely loud, as least enough to cause my sister not to speak to me for a while after blowing it in her presence. One short toot gives you the feeling in your ears you get after being at a rock concert for, say, 1/2 an hour to an hour.
The thermometer appears to be accurate, and the lens is a typical plastic type. Overall construction appears to be fairly solid.
To test it today, I stuck it in the freezer. After an hour at approx. -15 C (7 F?), the compass still spun freely, and the whistle blew fine.
Overall, I think this is a neat little product and will probably buy a few more for the rest of the family in the future.
