Efficient oximeter easy to use, simply insert your finger into the chamber then it will accurately determine your SpO2 and pulse rate in seconds. Small, portable and low power consumption. Equipped with lanyard convenient to carry around. Features: Accurate oximeter determines your blood oxygen saturation levels and pulse rate. 4-way rotating display, convenient for user and caregiver to check through one press power button. Automatically shut off in 8 seconds if there is no operation, energy saving. Built-in silicone membrane, non-slip, sweatproof and comfortable. TFT screen with large color digit simple to read, even child and elder can use it with ease. Comes with lanyard for easy carry and can be hung anywhere you need. Specifications: Material: Plastic Color: White Display Type: TFT Display Direction: 4-way SpO2 Measurement Range: 70%-100% SpO2 Measurement Accuracy: 70%-100%: ±2%;