Oxywatch Finger Pulse Oximeter

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Part# 13-05666
MFR Model# MD300C63


Pulse oximeter is a very important and common device to check oxygen saturation (SpO2) and pulse rate. As a small, compact, simple, reliable and durable physiological monitoring device, Fingertip pulse oximeter is widely applied in clinic, hospital, social medical organization, first aid etc.
    Environment Requirements
    Operation Temperature 5℃~40 ℃
    Storage Temperature -20℃~ +55℃
    Ambient Humidity ≤80% no condensation in operation | ≤93% no condensation in storage
    Atmosphere pressure 86kPa~106kPa

    Power Requirements
    Two AAA 1.5V, 800mAh alkaline batteries could be continuously
    operated as long as 30 hours
California Prop 65 Warning Symbol

WARNING: Cancer and Reproductive Harm -


  • Special battery cover for more durability
  • Dual color OLED displays SpO2, PR, Pulse bar and waveform
  • Low power consumption, automatically power off
  • Adjustable brightness; 6 display modes
  • Optional multi-color silicon rubber boot and carrying case


  • SpO2: Measurement range 70%~100%
  • Accuracy 70%~100%: 2%;
  • 0%~69% no definition
  • Resolution 1%
  • Pulse Rate: Measure range 30bpm~235bpm
  • Accuracy 30bpm~99bpm, 2bpm;
  • 100bpm~235bpm, 2%
  • Resolution 1BPM
  • Display: Type OLED display
  • Parameters SpO2, PR, Pulse bar,waveform


Recent heart transplant patient and take my vitals several times a day, was able to cover everything but O2 levels now that’s covered as well. Very happy with the product.

Jonathan E Verified Purchase


May 22, 2023

Michael C Verified Purchase


February 8, 2022

Works as it should!

Loyal B Verified Purchase


September 15, 2021

John C Verified Purchase


May 22, 2021

Ordered in March, delivered in October … a disappointingly LONG wait. I checked twice with your staff — they were courteous and patient — but there was, apparently, little they could do … presumably, the “trade war” ramifications and/or H U G E demand for the oximeter in response to the pandemic. So I decided to wait, in the interim purchasing a very similar device on-line … an unpleasant experience (Pay Pal a miserable payment choice). Eventually, you filled my order … USPS tracking every step. BOTTOM LINE: Your device appears to be virtually identical in form, fit and function to the one-third the price of the on-line device, However, I’m satisfied, — just disappointed about the inordinate delay. It would have been appropriate to receive periodic notices FROM YOU saying: Here’s the reason for the delay. In case you’re wondering, I’m 80 and a retired Air Force officer and cyber security specialist. I also was a defense contractor for 30 years. I understand multi-national procurement, perilous supply chains, unknown-unknowns, et al. It’s also true that a motto of “I intend to spoil you as my valued customer!” works every time. Will I look to you when I might need other devices you offer? Well yes, but with a bit of hesitation … not the zeal your otherwise “gold-standard reputation” for OUTSTANDING service merits. In closing, my sense is that you asked, in good faith, for a “good faith review.” DONE.

William S
November 3, 2020

It works as advertised. Response and readings are very fast and accurate. Reference comment by Larry C. there are numerous sources on SpO2 levels and hypoxia on the web that can found by doing a simple web search using the terms hypoxia SpO2 in the search engine.

Daniel P
October 21, 2018

Works as advertised. However, I bought it to monitor oxygen saturation while flying to avoid hypoxia, and theres nothing in the literature to tell you what levels constitute dangerous percentages. Id think paying that much, it should be included.

Larry C
June 18, 2018


Please note, Aircraft Spruce's personnel are not certified aircraft mechanics and can only provide general support and ideas, which should not be relied upon or implemented in lieu of consulting an A&P or other qualified technician. Aircraft Spruce assumes no responsibility or liability for any issue or problem which may arise from any repair, modification or other work done from this knowledge base. Any product eligibility information provided here is based on general application guides and we recommend always referring to your specific aircraft parts manual, the parts manufacturer or consulting with a qualified mechanic.

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