Features:Automatically transfer all measurements to APP: Pulse Oximeter and you can easily recall and check the changes.Determines your blood oxygen saturation perfusion index levels, and pulse rate in seconds.TFT clear display, 4 directions for conveniently reading.Numbers displayed on the screen would become red when reaching alarm value.Auto shut down in 8 seconds, energy-saving and eco-friendly.Mini oximeter with lanyard, portable for home or travel use.Built-in silicone membrane, non-slip, sweatproof and comfortable.Connection Step:1. Turn on BT of your mobile phone and open APP: Pulse Oximeter, then press Search Device, appearing FGSearching.2. Turn on the oximeter and insert your fingertip, long press the button to enter SETTING interface, choose EXIT to turn back to measure interface. (EXIT step for data activation.)3. Close the APP then open and search the device again, you can see the device number.Note: Item’s color may be slightly different due to the monitor setting or other factors, please in kind prevail. Thanks!