Specifications: Color:as the picture Display mode: 1.1 inch color OLED display screen Display resolution: 96*64 Accuracy: 70% ~ 100%: + 2%, no less than 70% definitions The measuring range of the pulse rate: 30bpm ~ 250bpm (1bpm resolution) Accuracy: + 2bpm or + 2% large value Weak perfusion error: in pulse filling ratio is 0.4%, oximetry can correctly display the oxygen saturation and pulse rate value, oxygen saturation error is + 4%; pulse rate error + 2bpm or + 2% take large values. Ambient light interference resistance ability: under indoor natural light and the existing lighting source of oxygen measurements and measurement under the condition of a darkroom value deviation less than + 1% compared to Power consumption: less than 30 mA Working voltage: DC 3.0V Batteries: 2 AAA 1.5V alkaline batteries Battery working hours: 20 hours minimum sustainable work, the theoretical value is 32 Safety type: internal power supply equipment, BF application part Net weight: 50g Included 1×Finger Pulse Oximeter (Battery not included) 1×Manual 1×Hanging Rope