100% brand new and high quality Features: Two color OLED display, 6 display modes; 3 parameters: SPO2, PR, and PI indicator; Sound alarm, brightness adjustable, alarm setting; Low-power consumption,continuously four direction adjustable; Low voltage indicator; Automatically power off in 5 seconds when there is no signal; Small in volume,light in weight,and convenient to carry Specifications: Display: LCD display or OLED display Display mode: 1.1inch color OLED screen display Display resolution: 96 * 64 SpO2 Measurement range: 70~99% Accuracy: ±2% (70%~99%), unspecified (<70%) Pulse rate Measurement range: 30bpm 240bpm Accuracy: ±1bpm or ± 1% (select larger) Power: 1.5V (AAA size) alkaline battery x 2 (Not included) Working current: 30mA Operating Voltage: DC 3.0V Battery Working Time: Minimum lasts 20 hours, the theoretical value : 32 Security Type: internal power supply, BF type application part Auto power off function: In the state of measuring interface, automatically shut down after the test finger disengaged within 5s Environmental Specification Operating Temperature: 5-40 degrees Celcius Storage/Transportation Temperature: -10 to 40 degrees Celcius Ambient Humidity: 15-80% on operation; 10%-80% in storage Air Pressure: 70 kPa- 106kPa Size: 5.8 x 3.5 x 3.2cm/2.28 x 1.38 x 1.26" Color: Hot Pink, Purple, Blue, Green, Gray Weight: 51 g Quantity: 1 Set Note: 1. Due to the different monitor and light effect, the actual color of the item might be slightly different from the color showed on the pictures. Thank you! 2. Please allow 0.5-1mm measuring deviation due to manual measurement. Package includes: 1 x Fingertip Oximeter (Batteries are not included) 1 x Lanyard 1 x English user manual