Efficient oximeter with mini size and stable performance. 2-way rotating LED display, get the accurate value in a short time and auto power-off for energy saving. Simple to operate even child and elder can use it at ease! Features: Accurate oximeter determines your blood oxygen saturation levels and pulse rate in a short time. 2-way rotating display for user and caregiver throught one press power button. Automatic shutdown if there is no operation for energy saving. Built-in silicone membrane, non-slip, sweatproof and comfortable. LED screen easy to read, even child and elder can use it at ease. Specifications: Color: Blue + White Material: ABS Display: LED SpO2: Display Range: 0-99% Resolution: 1% Accuracy: 70-99%: ±2%, 0-69%: no Definition Pulse Rate: Measurement Range: 25-250 BPM Resolution: 1 BPM Accuracy: ±1 BPM/ ±1% BPM Working Temperature: 5Â¡Ă¦-40Â¡Ă¦ Storage Temperature: -10Â¡Ă¦~40Â¡Ă¦ Power Supply: 2 * AAA Batteries (NOT INCLUDED) Item Size: 5.5 * 3.0 * 3.2cm / 2.17 * 1.18 * 1.26in