Parameters： Two parameters：SPO2, Pulse Rate. Waveforms: SpO2 Waveform Features： ·COLOR OLED display, four direction adjustable ·SpO2 and pulse monitoring, and Waveform display ·Low-power consumption, continuously work for 50 hours ·Small in size, light in weight, and convenient to carry · Low voltage alarm display, Auto power-off ·Runs on standard AAA batteries Detailed descriptions of product functions: SPO2: ·Measurement range: 70%-99% ·Accuracy: ±2% on the stage of 70%-99%, unspecified(<70%) for SPO2 ·Resolution: ±1% ·Low perfusion: <0.4% PR: ·Measurement: range:30BPM-240BPM ·Accuracy: ±1BPM or ±1%(the larger one) ·Power: two AAA 1.5V alkaline batteries ·Power consumption: below 30mA ·Automatic power-off: the product shuts down automatically after no signal for 8 seconds ·Dimension: 62mm*32mm*33mm ·Operation environment: ·Operation temperature: 5ºC-40ºC ·storage temperature: -10ºC-40ºC ·Ambient humidity: 15%-80% on operation 10%-80% in storage ·Air pressure: 70kPa-106kPa ·Declaration: EMC of this product comply with IEC60601-1-2standard