It works, beeps, the lights blink, I'm learning how to use it. For more information, you need to have two devices. It runs on a nine-volt battery, which is not very convenient. I'll convert it to 18650. Fast shipping, well packaged. Satisfied with the purchase, I recommend it.

Was very skeptical about this but it actually works my hair is kinky curly and i just brushed it and went through it small batches at a time definitely recommend

Works great on split ends.

Excellent product

Good

Pretty good for the price. Have to try a few times to get it to read correctly. Reads plated stones.

Great item. should work well

Thanks everything went great

It works well

Love the product

Works great

A good product works well, I recommend it.

Pleased, tried it on my sectioned straightened hair and it really cleaned up the scraggly ends! the cover over the section where the hair trimmings are is hard to get off, but otherwise it's great!

Great product and easy to use.

All good

Wonderful, thank you

Works great and came as it was described

It’s easy to use, and my hair feels healthier now. However, you might want to use the cape to prevent hair from falling on your shoulders.

I love this item. It took care of all my dead ends and also the damage parts of my hair.

Was honestly skeptical about this product but it actually works and works well.

So far so good.

Works as it should , pretty solid . Tests good.

I don't know how to use it yet, not manual. You have to buy 9v battery. Good item! Arrived quick! :)

Easy to use, very practical and accurate

The product was as described, thanks for fast shipping.

This tester works perfectly, tested on cubic zirconia no results , tested with real diamond got correct beep definitely worth the money and it’s definitely a great price!

It works well

excellent

Excellent, I loved it ❤️❤️ after using it my hair became super soft.

Love it thank you

Its pretty good just needs batteries and it doesnt come with any. Came pretty fast igs like 3 days before it was supposed to