SpO₂ range & accuracy: 70–100 % (±2 % at 80–100 %; ±3 % at 70–79 %).
Pulse rate: 25–250 bpm, accuracy ±1 bpm or ±1%.
OLED display: Shows SpO₂, PR, pulse strength bar graph, and waveform.
Lightweight & portable: Measures ~58 × 36 × 33 mm, easy to carry—works ~20 hours on two AAA batteries.
Auto shut-off: Saves battery power by turning off after inactivity.
The Oromi A4 is a user-friendly, accurate, and affordable fingertip oximeter. Its clear OLED display, reliable measurement range, and compact design make it an excellent choice for monitoring respiratory or cardiovascular health at home.