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All feedback (146)
- superman_sw (2008)- Feedback left by buyer.More than a year agoVerified purchaseGood buyer!
- bestdeals_us (15618)- Feedback left by buyer.Past 6 monthsVerified purchaseQuick response and fast payment. Perfect! THANKS!!
- altered1-2 (708)- Feedback left by buyer.Past 6 monthsVerified purchaseGreat buyer thanks
- batterygalaxy (1058800)- Feedback left by buyer.Past 6 monthsVerified purchaseAAAA++++ Super Fast Payment!! Excellent eBayer!! Hope to do business again!!
- raviloks (30764)- Feedback left by buyer.Past yearVerified purchaseGood buyer, prompt payment, valued customer, highly recommended.
- pokemongameher (108)- Feedback left by buyer.Past yearVerified purchaseI appreciate your purchase!❤️
Reviews (3)

Apr 14, 2018
Ok but not great
A regular microphone works better than this product for tuning pianos.

Apr 19, 2019
Use only for fresh installation
It only works for a fresh installation, so didn't work for me.
Digital Spirometer Lung Breathing Diagnostic Vitalograph Spirometry + Software
May 17, 2018
FVC is inaccurate.
The FVC reading is about 30% below calibrated values. It does not measure low air flow. Quality would be OK if the flow vane was more sensitive.