Satisfaction Guaranteed. FDA 510K Approved. (Number K070371) for Professional Medical Use. Interference resistance against ambient light One Button Operation, Auto-shutoff after 8 Seconds Three parameter reading (SpO2, Pulse Rate, 7-segment Bargraph) Ultra-Lightweight (1.8oz or 50g including batteries) Easy to carry: Neck/wrist cord, Carrying case 30 days Money back Satisfaction Guarantee FDA approved 300C Digital Finger Pulse Oximeter combines advanced technology with a stylish, wearable design. The outstanding interference resistance capacity against ambient light along with wide-range accurate measurement even in low perfusion make this fingertip pulse oximeter one of the best oximeters in the world. Featured with a large bright red perfusion LED display which allows you read in the dark and severe weather condition, 300C Fingertip Pulse Oximeter provides accurate readings (SpO2, PR, 7-segment Bargraph) with affordable price. It is equipped with pulse oximeter and sensor in one unit providing fast, real-time, reliable blood-oxygen saturation percentage, pulse rate and pulse strength measurements, with one button keypad and auto 8 seconds power-off. This item is covered under 1-year manufacturer's warranty. Patient Range Adult, Pediatric and Neonatal Display Type: LED Parameters: SpO2, PR, Pleth bar. Information: low power SPO2 Measure Range: 35-99% Resolution: �1% Accuracy: 75%-99%:�2% 50%-75%:�3% 0%-50%:unspecified Pulse Rate Range: 30-254 BPM Resolution: �1bpm Accuracy: �2bpm Battery Type: 2 AAA Alkaline batteries or rechargeable batteries Power Consumption: less than 30Ma Voltage: 2.6-3.6V Environmental Operating Temperature: 0-50 C Storage Temperature: -10 C - 60 C Operating Humidity: 15%RH - 95%RH Storage Humidity: 10%RH - 95%RH