CHOICEMMED PULSE OXIMETER
Choicemmed Oxywatch C20 Pulse Oximeter, retail $49.99 (www.wallmart.com...)
Manufactured by Bejing Choice Electronic Tech. (www.choicemmed.com/)
Last updated 03-17-14
This product does not emit very much light of its own, and is not intended to be used as a light source. Therefore, my standard review format will not be used and the product will not be assigned a rating.
The Choicemmed Oxywatch C20 Pulse Oximeter is a small, discreet device designed to measure your SpO2 (blood oxygen saturation) expressed as a percentage value by simply clipping it to your fingertip. It also measures your pulse (heartbeats per minute).
It operates from a pair of AAA cells, and has an OLED (organic light-emitting diode) display.
SIZE
To use your spiffy new Choicemmed Oxywatch C20 Pulse Oximeter, simply squeeze the unit on the end opposite the black power pushbutton, slip your finger in, and gently release.
Press & release the black pushbutton. If necessary, press & release it one or more times until the display is rightside-up.
Within several seconds, the unit will display your SpO2 and your pulse.
Once the product is removed from your finger, it will turn itself off after approx. ten seconds.
To change the batteries in your Choicemmed Oxywatch C20 Pulse Oximeter, turn it upside-down, slide the battery door off in the direction of the embossed arrow, and set it aside.
If necessary, remove and dispose of or recycle the two used AAA cells as you see fit.
Install two new AAA cells, orienting them so that their flat-ends (-) negatives face the spring for them in each compartment.
Slide the battery door back on, and be done with it.
Photograph of the product's display.
Spectrographic analysis of the OLEDs in this instrument's display.
The raw spectrometer data (tab-delimited that can be loaded into Excel) is at http://ledmuseum.candlepower.us/45/oximeter.txt
Spectrographic analysis of the LED in the product's sensor.
Spectrographic analysis of the LED in the product's sensor; spectrometer's response narrowed to a band between 650nm and 660nm to pinpoint peak wavelength, which is 657.380nm.
The raw spectrometer data (tab-delimited that can be loaded into Excel) is at http://ledmuseum.candlepower.us/45/oximete2.txt
USB2000 Spectrometer graciously donated by P.L.
Video on YourTube showing the Choicemmed Oxywatch C20 Pulse Oximeter in operation.
You can also see where I pushed the button on its front that causes the display axis to rotate in 90° increments.
O BOY!
A PULSE OXIMETER DOING WHAT IT WAS DESIGNED TO DO!!
So thrilling!!
So pulse-racing!!!
Actually, it kinda "maiks" "ewe" "wontt" "tu" "kik" "ovorr" "won" "uv" "thoz" "Penile-Whear®" "liggecher-rezistent" "prizen" "commbies" "ahnd" "thenn" "pruhseed" "tu" "bete" "thuh" "livengg" "tweadle" "owt" "uv" "itt" "withh" "uhn "olde" "orr" "uzed" "tuthbrusche" doesn't it? 
This video is 4001.9455342856 megabytes (4,298,867,604 bytes) in length; dial-up users please be aware.
It will take no less than twenty thousand ten minutes (!!!) to load at 48.0Kbps.
This video is definitely ***NOT*** dial-up friendly!!! 
TEST NOTES:
Test unit was used by my aunt Voni, who became worm food on the morning of 03-13-14.
MANUFACTURER: Bejing Choice Electronic Tech.
PRODUCT TYPE: Pulse oximeter
LAMP TYPE: OLED (organic light-emitting diode), deep red LED for sensor
No. OF LAMPS: Unknown number of OLEDs (lots and lots of them!), 1 deep red in sensor
BEAM TYPE: N/A
REFLECTOR TYPE: N/A
SWITCH TYPE: Pushbutton on/display orientation on upper surface of producr; auto-off
CASE MATERIAL: Plastic
BEZEL: Display protected by plastic window
BATTERY: 2x AAA cells
CURRENT CONSUMPTION: Unknown/not able to measure
WATER- AND URANATION-RESISTANT: Very light splatter-resistance at maximum
SUBMERSIBLE: ¡¡¡LA GRAN CALABAZA CAGANDO GRANDE GORDO EN PORCHE DE ALGÚN POBRE CABRÓN LUZ, NO!!! 
ACCESSORIES: Nylon storage pouch, wrist strap, possibly 2x AAA cells
SIZE: 57mm L x 32mm W x 36mm D
WEIGHT: 58.50g (2.060 oz.) incl. batteries & lanyard
COUNTRY OF MANUFACTURE: China
WARRANTY: 2 years
Choicemmed Oxywatch C20 Pulse Oximeter * www.wallmart.com...
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