Check the listing for details. Oxi-go Oximeter Plus- finger pulse spot-meter LED display lightweight. Condition: Open box. Listed at 19.95 USD. Oxi-go Oximeter Plus- finger pulse spot-meter LED display lightweight. Oxi-Go Premier pulse oximeter is an outstanding tool for blood oxygen saturation and pulse rate monitoring or spot checking. It offers the person the opportunity to manage and control his/her stats. Plus it provides quick and precise results. Batteries not included- needs 2 AAA.Features and BenefitsLarge LED displayDisplay SpO2 pulse rate and pulse bar.Low power consumption, automatic power off.Approximately 30 hour normal operation.Low Battery indicatorSupports 2 AAA alkaline or rechargeable batteries.Small and lightweight design (total 0.09 lbs without batteries)Accommodates widest range of finger sizes from pediatric to adult.Materials Included1 Premier Oximeter Unit1 LanyardUser ManualTechnical SpecificationsSpO2Measurement Range: 70-100%Resolution: 1%Measurement Accuracy:80%-100%; ±2%70%-79 %; ±3%0%-69 %;unspecifiedPulse RateMeasurement Range: 30-235 bpmResolution: 1bpmMeasurement accuracy:30-100 ±2 bpm101-235 ±2 101 - 235 ±2%EnvironmentalOperational Temperature: 41°F to 104°FStorage Temperature: -4°F to 131°FOperation Humidity: ≤ RH 85%Storage Humidity: ≤ RH 85%Electromagnetic Compatibility:This product complies with IEC60601-1-2 for electromagnetic compatibility Class BDisplayType: Large Bright Digital LED displayParameters: SpO2, Pulse Rate, Pulse BarMode: 1 Display ModeInterference Resistance Capacity against Ambient LightDeviation is smaller than ± 1% between values of Oxyhemoglobin measured in natural lighting indoor condition and present lighting sources and that measured in dark room.Mechanical:Dimension: 2.3" x 1.3" x 1.3" (L x W x H)