An affordable and portable pulse oximeter for monitoring pulse rate and blood oxygen saturation on an outpatient basis. Ideal solution for patient monitoring at home and in the hospital, in emergency medicine, for self-monitoring of health status and monitoring the effectiveness and safety of sports training. One of the most popular models of pulse oximeters, which has established itself as the most affordable and reliable in operation. Key Features: Lightweight for carrying and Easy-To-Use. Manually adjust the direction of interface. OLED display , simultaneous display for testing value and plethysmogram. Real-time spot-checks. Low battery voltage indication. Sleep monitoring function. Data storing and data analysis function. Specifications Sleep monitoring time: 8 hours Display direction: OLED blue and yellow two-colour display, 6 display modes, 4 display directions Display Type:OLED display SpO2 Measurement range:70%~99% Accuracy: ±2% on the stage of 80%~100%; ±3% on the stage of 70%~80%; Below 70% no requirement Resolution: ±1% PR:Measurement range: 25BPM~250BPM Accuracy: ±1BPM or ±1%(the larger one) Power: 2x AAA 1.5A alkaline batteries (not included) Power consumption: below 30mA Automatic power-off:the product shuts off by itself when no finger is in the product >=8 seconds Operation Environment:Operation Temperature: 5C~40C Storage Temperature: -20C~55C Ambient Humidity: 15%~85% non-condensing In the Box 1 x Fingertip Pulse Oximeter LK88 1 x Product Manual