Fingertip pulse oximeters typically display blood oxygen saturation (SpO2) and pulse rate. Many models also show a pulse waveform or pulse-strength indicator alongside numeric values on an OLED, LED, or similar screen.

Most fingertip pulse oximeters are battery powered. Several listings specify 2 AAA alkaline batteries and some packages include batteries and accessories; however, a few entries note different power arrangements (one listed "Battery: No Battery Used").

Product information commonly recommends placing the device on a fingertip, with the index, middle, or ring finger cited as suitable locations for taking a reading.

Common accessories include a lanyard or wrist strap, a carrying case or pouch, batteries (in some packages), and instruction materials. Some listings also mention storage bags or belt pouches.

Yes — several devices include auto power-off or auto-sleep features to conserve battery. For example, one listing notes the device enters auto-sleep after 8 seconds; other models simply list an auto turn-off function, with timings varying by product.

Descriptions vary across listings: some call the device "medical-grade" or refer to real-time measurements, while at least one explicitly states the fingertip pulse oximeter "is not a medical device" and should not be used for medical diagnosis or treatment.