Operator's ManualTwo AAA alkaline batteriesFree Lanyard Included Nonin 9590 Onyx Vantage Highlights:Brilliant, easy-to-see LED SpO2, and pulse rate can be read from any angle, day or night.Proven durability -The Onyx is proven tough enough to withstand a minimum of 50 dropsAutomatic turn on and off -For fast and easy spot checksPortable - Take the Nonin Onyx Vantage 9590 anywhere—it weighs less than two ounces PerformanceThe lightweight and compact size, along with the automatic on/off operation features make the Onyx extremely easy to use - anywhere, anytime. The energy-efficient Nonin 9590 Onyx finger pulse oximeter is powered by 2 AAA alkaline batteries and operates for approximately 6,000 spot checks (40 seconds) or up to 36 hours of continuous use before battery replacement is necessary.
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