Sound alarm， brightness adjustable， alarm setting!!- Two color OLED display， 6 display modes;- 3 parameters: SPO2， PR， and PI indicator;- Low-power consumption，continuously four direction adjustable;- Low voltage indicator;- Automatically power off in 8 seconds when there is no signal;- Small in volume，light in weight，and convenient to carry Specifications- Display: LCD display or OLED display- PI Measurement performance in low perfusion condition: 0.3% Perfusion Index (PI) measurement in %- SpO2 Measurement range: 70~99% Resolution: ��1% Accuracy: ��2% (70%~99%)， unspecified (<70%)- Pulse rate Measurement range: 30~240 bpm Accuracy: ��1bpm or ��1% (select larger) - Power:1.5V (AAA size) alkaline battery x 2- Working current: ��30mA- Automatic power-of: Automatically power off when no signal in the oximeter for more than 8 seconds- Environmental Sepecification Operating Temperature:5-40 degrees Celcius; Storage/Transportation Temperature:-10 to 40 degrees Celcius; Ambient Humidity:15-80% on operation; 10%-80% in storage- Declaration:EMC of this product complies with IEC60601-1-2 standard