great stuff was 4th stage head and neck cancer a year ago no tumors now , have 2 friends that have been helped with this too it's a life saver
n***7 (896)- Feedback left by buyer.
Past month
Verified purchase
A+++++++++++++++++++++++++++++++++
r***k (119)- Feedback left by buyer.
Past month
Verified purchase
Product is as expected. Tested one oximeter and compared to a well known brand. Results was excellent. Readings +\- 1 . I will distributing these to healthcare employees to use for basic vital signs.