Wireless Fingertip Pulse Oximeter, 2 Way Display , Bluetooth Communicating Smartphone (iOS & Android) Measures SpO2 percentage as well as pulse rate automatically. Bluetooth 4.0 to communicate with Android or iOS phone or tablet Monitor shows Oxygen level , pulse rate . 2 direction display . Connected Android systems shows Oxygen level , pulse rate , Perfusion index , waveform . Smartphone also can show historical data, send data via email or txt message ( Android Only , iOS is under development ) Suitable for sports and/or aviation , home use