Fingertip Pulse Oximeter designed for patient use Lightweight Hinge-style unit constructed of durable plastic Shows pulse rate and blood oxygen level One-touch display Completely self-contained, with no external devices Advanced display features backlit LED for easy viewing in dim light Requires one, easy-to-replace AAA battery (included) Automatic shut-off feature (after 8 seconds) to help preserve battery life Includes a convenient lanyard so it is always close at hand 1 Year warranty