NT1B Handheld Pulse Oximeter has a bright, easy to read broad LED Display with Charger. Durable, solid and Lightweight. Audible/Visual Alarms with Adjustable. Important Factors Weight 195g/100g. Dimensions: Dimensions 130mm69mm22mm. Audio Indicators Probe: Audio Indicators Probe off audio indicator Pulse audio indicator Key pressing indicator Low power voltage. Visual Displays: Visual Displays and Indicators Sp02 Display Red LED, variable brightness Pulse Rate Display Green LED, Variable brightness Pulse intensity Red LED 8 Bars Power Indicator Light Green Normal Low Power Voltage Red and Blink Low Perfusion Indicator Red Bar. Pulse Rate Measurement: Pulse Rate Measurement range 30 250 bpm skill 1 bpm or 2%. Measurement Range: SpO2 Measurement Range 0?100% Accuracy2% during 70%?100% 0%?69% unspecified. Suitable: Suitable for Adult, Pediatric and Neonate. Utilized: Can Be utilized for Spot Check or Continuous Monitoring. Environmental Specifications Temperature Range: Operation 0?+50? Transport/Storage: -40?+70? Relative humidity:Operating: 10?95% (noncondensing) Transport/Storage: 0?95% Vibration: Meets or exceeds ASTM 4728, (Method C) MIL-STD-810E, (Method 514.4, Section 1.3.4.3) IEC 68-2-37.