Details: Features: 1.Bright , stream line design , and comfortable to handle; 2.Digital technology; 3.Alarm function: audible and visual; 4.Easy to read LED visual displays and indicator; 5.Power saved and audio adjustable; 6.Rechargeable Li-ion battery , 3.3V; 7.7 different colors for your choice; 8.Accurate measurement during low perfusion; 9.Anti-movement table performance. Specs: Patient Range Adult, pediatric, neonatal patients SpO2 Measurement range: 70~ 100% Accuracy: 1% ( 86% ~ 100% ) , 2 % ( 70% ~ 85% ) Resolution: 1% Pulse Rate Measurement range: 30~ 250 bpm Accuracy: 1bpm Resolution: 1bpm Display Mode High Brightness Color LED Display Area: 57( W) X40( H) mm Function Audible and visual alarm Battery low power and silence alarm AUTO power off after 2min no signal input Power Supply Input : DC. 2.8V~ 5.4V Battery: 3.3V Li-ion Rechargeable 8 hours for continuous working Environment Requirements Temperature: Working: 0 ~ 50 degrees Transport and storage: -20 ~ 60 degrees Humidity: Working: 15 ~ 95% ( non-condensing) Transport and storage: 10 ~ 95% ( non-condensing) Atmospheric pressure: Working: 86 KPa ~ 106 Kpa Transport and storage: 50KPa ~ 106 Kpa Dimension and Weight 60 ( W) X 110 ( H) X 33 ( D) mm 100g ( not including sensor ) Configuration Main unit 1 pc Lemo 5 Pin digital Spo2 sensor 0.9m 1pc Charger 1 pc Sling rope 1 pc Built in 3.3V Li-ion rechargeable battery 1 pc Operation manual 1 pc