brand new and high quality Features: Monitoring person's blood oxygen level(SpO2), pulse rate(PR) and perfusion lndex(PI). High accuracy and real-time measurement indication.Good assistant for doctors and nurses. Large screen provides clear and comfortable measurement. when no finger is inserted, it will turn off automatically in 15 seconds. Small and compact size can be conveniently carried in a pocket, backpack or other methods. Come with lanyard, you can wear around the neck while hiking or training. Suitable for use at home or outdoor activities. Notice: Dark Blue fingertip pulse oximeter is design with 4-color screen display. Gray,for Sky blue,Pink fingertip pulse oximeter are design with 4-color screen display. Specification: Parameters: Pulse Rate,SpO2,Perfusion Index Battery: 2x AAA batteries (not included) Power consumption: less than 30 mA Voltage: DC3.0V Screen resolution: 128 x 64PR Measuring range: 30bpm~250bpm Blood oxygen saturation measurement range: 0%~ Material: ABS Color: Deep blue,Gray,for Sky blue,Pink Size:app. 5.7 x 3.2 x 3.1cm / 2.24 x 1.25 x 1.22in Quantity: 1 set Note: Transition: 1cm=10mm=0.39inch No retail package. Please allow 1-2cm error due to manual measurement. pls make sure you do not mind before you bid. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you! Package includes: 1 x Fingertip Pulse Oximeter 1 x Lanyard 1 x User Manual(other accessories demo in the picture is not included.)