Features: - Reliable accuracy and durability - 3 Color LED Display, four display modes. - 4-Direction Display adjustable. - Low voltage indicator, Real-time spot-checks. - Low power consumption,50 hours continuous to work. - Low Perfusion 0.4% - Automatic power off when no signal - Small and light weight, convenient to carry Packing List: - Oximeter machine x 1 - Hanging belt x 1 - English user manual x 1 WARNING! This is not a medical device! For sports & Aviation use ONLY.