Available Microtek Oximeter FDA, CE,ISO certified. Technical Parameters: Display Type: Hi-Grade Vivid Dual Color OLED Screen Power: DC 3V(2xAAA Batteries) SpO2: Measurement Range: 35-100%, Resolution: 1%, Accuracy: 70%-100%, 35%-69% no definition Pulse Rate: Measurement Range: 25-250bpm, Resolution: 1bpm, Pulse Intensity: Bargraph Indicator Perfusion Index: 0.2% to 20%, Resolution: 0.1% Operation Time: Upto 24Hrs. continuous (depending on Batt. condition) Model: OX-06 1 YEAR WARRANTY MOQ: 100/1000