Brief introduction


CMS50NA Pulse Oximeter is a portable equipment adopting advanced technology, it mainly checks SpO2 and PR value through the finger, which provides advanced, non-invasive and scientific means for quantitative measurement of oxygen saturation. 

CMS50NA Pulse Oximeter is applicable for use in plateau area, community healthcare, oxygen bar, Fitness clubs, physical training room, family and medical institution, etc. 


1) Can measure SpO2 and Pulse Rate accurately

2) SpO2 and Pulse Rate display,Pulse Rate waveform and bar graph display 

3) Battery voltage low indication

4) The display mode can be changed.

5) Screen brightness adjustable


SpO2 measurement range: 0%~100%

Accuracy: 70%~100%: ±2%

 0%~69%: unspecified

PR measurement range: 30bpm~250bpm

Accuracy: ±2bpm or ±2%, whichever is greater.


SpO2: 1% 

PR: 1bpm

Measurement Performance in Weak Filling Condition: SpO2 and pulse rate can be shown correctly when pulse-filling ratio is 0.4%. SpO2 error is ±4%, pulse rate error is ±2 bpm or ±2%, whichever is greater.

Resistance to surrounding light: The deviation between the value measured in the condition 

of man-made light or indoor natural light and that of darkroom is less than ±1%.

Working current: ≤30mA

Power supply: two “AAA” batteries

Safety classification: type BF applied part

4.Physical characteristic

Dimension: 57mm(L) × 34mm(W) × 31mm(H)


♦a pulse oximeter

♦a pouch

♦a lanyard

♦a user manual


1. Paypal,  


1. We will ship the item within 2 days after receiving your payment.  

2.USA buyer,USPS 2-6 working days delivery from USA warehouse,To other country buyer,ship from China warehouse.

3. All items will be shipped to buy's ebay address. Please check your ebay address  is right.

Note: For your earlier and safer to receive the item, please leave us your detailed address and telephone number.

Terms of Sale


We offer 60 days return policy. 100% satisfaction is our goal!

1.All items are brand new ,with 1 years warranty.              

2.If you have a defective item, you want to return or discount. Please contact us within 2 days from you receive the shipment.

3.We will refund the money to you when we get the return items or replace item for you.

4. All return items must be returned with it's original packaging and accessories. Customer is responsible for shipping charges on returned items.

 International Buyers - Please Note:

 ? Import duties, taxes and charges are not included in the item price or shipping charges. These charges are the buyer's responsibility.

? Please check with your country's customs office to determine what these additional costs will be prior to bidding/buying.


please leave me a positive feedback if you are satisfied with our products, thanks!I will appreciate your positive feedback ,and in any case or some problems with the products,Please contact us before leaving Negative Feedback. I am sure I will give you a satisfied answer.

Buy safe products

The following FDA Disclaimer is required for all eBay listing in Healthcare category and is included for REFERENCE: The sale of this item may be subject to regulation by the U.S. Food and Drug Administration and state and local regulatory agencies. If the item is subject to FDA regulation, we will verify your status as an authorized purchaser of this item before shipping of the item.

The Fingertip Pulse Oximeter is registered on the Australian Register of Therapeutic Goods (ARTG)with the code 197923, and certified by FDA of United States and CE,TUV of Europe. The  Fingertip Pulse Oximeter that is FDA 510K Approved      

About Us

Contec Medical System-----Focusing on research, manufacture and distribution of medical equipment,founded in 1992 as a professional medical equipment producer .At present,there are more than 1200 employees in our company .Our product lines cover a wide range of 13 categories,and have been distributed over 30 countries.We are the manufacture of medical equipment for more than 20 years, main products include ECG machine,Patient monitor,EEG machine,pulse oximeter,Fetal doppler,Blood pressure monitor and so on.

Contact Us

If you have some questions just feel free to contact us by the following ways:

Contact person: Vivian Zhang

Address(US): 1440 Chase Avenue,Elk Grove Village,Illinois 60007 United States