The John Bunn Economy Pulse Oximeter"s lightweight construction, compact design, and state-of-the-art medical engineering are enough to quicken your pulse. Simple, accurate, and fast, this high-tech pulse oximeter is easy-to-read and ideal for use at home, the clinic, or in EMS situations. Additional Information * Lightweight, pocket-size solution * Provides fast and accurate SpO2 and pulse rate measurements * Easy-to-read, large LED color display * 10 adjustable brightness settings * Simple one-button operation * Automatic power-off to conserve batteries * Accommodates wide range of finger sizes from pediatric to adult * Requires two 1.5V AAA alkaline batteries * Operating temperature range: 41° F – 104° F (5° C – 40° C) * Operating relative humidity: 15% to 80% RH * Operating atmospheric pressure range: 10.15 psi to 15.37 psi (70kPa to 106kPa) * Dimensions: 2.28W x 1.26D x 1.34H in. (58W x 32D x 34H mm) * Weight: Approximately 2 oz. (50 g) with batteries * Low battery indicator alarm * Accuracy (% SpO2): 80% - 99% ± 2%; 70% - 80% ± 3% * Pulse rate display range: 30 to 235 bpm * SpO2 display range: 0% to 100% * Manufacturer"s warranty included - see Product Guarantee area for complete details * FDA approved, no prescription required * Oxygen saturation and pulse rate measurements * Multi-directional display for easy reading * Lightweight and compact design * Ideal for home, clinical, and EMS situations * Manufacturer"s warranty included