Features for Fingertip Pulse Oximeter: – Reliable accuracy and durability – Four Display model – Low voltage indicator, Real-time spot-checks. – Low power consumption – Low Perfusion ≤0.4%-Automatic power off when no signal – Small and lightweight, convenient to carry ...Features for Fingertip Pulse Oximeter: – Reliable accuracy and durability – Four Display model – Low voltage indicator, Real-time spot-checks. – Low power consumption – Low Perfusion ≤0.4%-Automatic power off when no signal – Small and lightweight, convenient to carry Specification for Fingertip Pulse Oximeter: Display OLED Two-color display SpO2Measurement range: 70~99% Accuracy: ±2% (70%~99%)Resolution: ±1%Pulse rateMeasurement range: 30~240 bpm Accuracy:± 2bpm or 2% Automatic power-off:Automatically power off when no signalDimension & Weight: 60 (L) × 35(W) ×35(H) mm 3 (without batteries)Package: – 1 x Fingertip Oximeter – 1 x English user’s manual