I just bought a $3000.00 gibson acoustic and i need something accurate to keep an eye on relative humidity. i s this accurate?

google the Salt Calibration for the hygrometer, basically you put some salt and water (purified) in a waterproof container and place that container inside a large ziploc bag. the salt/water will reach equilibrium in roughly half an hour. at which time the relative humidity in the bag will be 72%. something like that,

I am unable to determine. It is not on the outside of the body and not in the battery compartment. If forced to put money on it, I'd have to go with China. But I don't know.

What is the min/max buttons for? When do you use them?

The min and max buttons just record whatever temperature/humidity you have on the screen when you press them so you can refer to them later. For example, if the temp is reading 85 degrees F and 65% relative humidity, then when you press the 'max' button, it will record those values, so when you turn it on at a later time, you can refer to those maximum and minimum values that were recorded.

ASIN	B0140UC9XQ
Batteries	1 CR2 batteries required.
Customer Reviews	4.4 4.4 out of 5 stars (3,947)
Date First Available	May 21, 2016
Is Discontinued By Manufacturer	No
Item model number	ITH-10
Product Dimensions	9.91 x 9.91 x 0.99 cm; 9.07 g

Inkbird ITH-10 デジタル 温度計 湿度計 温度湿度データロガー °Cと°Fの切り替え

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Inkbird ITH-10 デジタル温度計湿度計温度湿度データロガー °Cと°Fの切り替え