The device is of good quality and at an amazing price! It is easy to use and calibrate. The readings are large and easily visible. Nice case and batteries. The YOSOO seller also shipped quickly. It's the same product that many "audiophile bullies" on the internet (you know who you are) sell for five times the price. It amazes me how they can still be in business and resell the same product at an inflated price and then magically be "Audiophile Approved". The Chinese have completely changed the HIFI audio business model. I've been an "audiophile" for over 50 years and I have to say that in my opinion most audio products today are cheaper and sound better. Today is truly a new "golden age" of audio equipment.
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