The RMS deviation is as low as 1.66 in the SPO2 range of 70-100% Designed for the elderly and the with weak pulses. When the pulse strength is less than 0.3% Still to accurately measure blood oxygen saturation and pulse rate Through the ring-shaped silicone light-shielding layer, the finger fit is indicated.It can reduce the interference of ambient light and make the measurement more sensitive.High signal transmission quality The finger clip oximeter uses the finger as a transparent container for hemoglobin and uses two different wavelengths of light as the incident light source to calculate the hemoglobin concentration and blood oxygen saturation.The accuracy of the data is greatly improved Four-way reading display, easy to switch readings, very convenient After powering on, each time you the power button, the device change Display mode to meet the needs of reading at different angles Product name:Finger-clip Display mode:OLED display Blood pressure protection level (measurement range):70%-99% Power consumption:Less than 30mA Pulse rate (measuring range):30bpm-250bpm Range: ±2bpm SpO2 measurement accuracy:70%-100% range:±2% Color:As Shown Material:ABS Package Contents: 1 * Finger-clip Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.