Small, lightweight and portable device suitable for use with either adults or children. Its affordable price means it is the perfect addition to any clinical environment or even for spot checking before, during and after exercise. SpO2%, PR and Pleth waveforms are displayed on screen. The display can be easily rotated to display in 4 directions. Simple and convenient operation OLED display, compact (the weight is 50g including batteries). Low power consumption, two AAA batteries can be continuously operated for 20 hours. The brightness of background light is adjustable. Range: 30-235 BPM. Accuracy: +/- 2 BMP. 2 AAA Alkaline batteries included. Sp02 Range: 70-99%. Resolution: +/-1%. Accuracy: 80%-99% +/- 2%, 70%-80% +/-3%, <70% no definition