1、Lightweight for carrying and easy to use. 2、Manually adjust the direction of interface. 3、Color LED display, simultaneous display for testing value and plethysmogram. 4、Low Perfusion:0.2%.(Advanced Digital Signal Processor algorithm canimprove measurement accuracy, under the condition of low perfusion.) 5、Visual and Sound alarm function. Real-time spot-checks. Features: Lightweight for carrying and easy to use. Manually adjust the direction of interface. Color LED display, simultaneous display for testing value and plethysmogram. Low Perfusion:0.2%.(Advanced Digital Signal Processor algorithm canimprove measurement accuracy, under the condition of low perfusion.) Visual and Sound alarm function. Real-time spot-checks. Low Battery voltage indicator. Automatically switch off. Standard two AAA 1.5V Alkaline Battery(Not included) support more than 20 hours continuous work. Specifications: Condition:100% Brand New Color. Orange Dimensions:Approx.74*37*38mm/2.9*1.5*15in(L*W*D) Power Internal: 2xAAA 1.5v alkaline battery(Not included) Power Consumption Smaller than 30mA(Normal) Environmental: Operating Temperature: 10°C to 40°C Storage Temperature: -20°C to 70°C Relative Humidity: 15% to 90% non-condensing Air Pressure 86Kpa-106Kpa Operating Attitude 0-2000 m Alarm default value: Parameter Value Hemoglobin saturation: Upper limit: 100/ bottom limit:90 Pulse rate: Upper limit: 130 /bottom limit:50 Probe LED Specification: Wave Length Radiant Power RED 660±2 nm 1.8 mW Infra RED 905±2 nm 2.0 mW Electronics Parameters: Parameter Value Hemoglobin saturation display 35-100% Pulse rate Display 30-250 BPM Resolution Hemoglobin Saturation 1% Pulse rate 1 BPM Measure Accuracy: Hemoglobin Saturation ±2% (70%-100%) Unspecified (≤70%) Pulse rate ±2 BPM Package List: 1*Instruction Manual 1*Host 1*Hand Strap 1*Cloth bag