4 in 1 multifunctional compass / / key chain compass/whistle/magnifying glass/thermometer /

Detailed Product Description
Material: ABS material
Colour: black is given priority to
Size: 30 * 85 * 20 mm
Net weight: 0. 028 kilograms
Functions:
1, whistle
2, refers to the north (south) needle
3, hygrometer (environment temperature know fairly well)
Built-in thermometer
Temperature measurement range: - 30 to 50 ℃ or - 20 to 120 degrees Fahrenheit
4. A magnifying glass (hide)
This small whistle and also with the Compass, the function of the thermometer, and equipped with hang buckle, can go to the lavatory to hang in his loins, and convenient to carry. In the wild, this a few are very necessary tools, can provide timely help
This product is suitable for travel, party, field activities and various competition activities to use.