Finger Pulse Oximeter Pulsioximetro SpO2 PR OLED Rechargeable Oximeter Heart Rate Monitor

Specification:  Display: OLED display.  SpO2:   Measurement range: 70~99%.  Resolution: ± 1%.  Accuracy: ±3% ( 70%-99% ) , unspecified ( < 70% ).  Pulse Rate:   Measurement range: 30-240 bpm.  Resolution: ± 1%.  Accuracy: ±bpm or ± 2 % ( select larger ).  Low Perfusion: ≤ 0.4 %.  Power: Rechargeable lithium battery.  Automatically power off: Automatically power off when no signal inthe oximeter for more than 8 seconds.                              HOW TO USE:  1. Pinch the clip as shown.  2. Insert your finger into the oximeter (finger down, nails aim at the infrared source) and then release the clip. Don't shake, Keep your fingers stable.  3.When the waveforms are consistent, read the relevant data directly from the display screen. (Press the button once during measurement to convert the display direction once, and you can convert 4 directions in total, 6 display modes)    NOTE:  1. Nails can't too long.  2. Don't printed or bright nails.   3. Finger keep dry.    Features:  1. Prod