a. Fingertip Oxymeter Machine b. Batteries

Yes, Smartphone device equipped with Bluetooth is necessary

Yes, This Fingertip Oxymeter is compatible with both Android and iOS.

Yes, Its compatible

Go to App store or google play store Search for SehetKum

Once the app is downloaded in your smartphone, No need Wi-Fi or cellular data. Fingertip Oxymeter connects to your mobile device through Bluetooth.

Yes.

No. Because the device will be switched-off as soon as you remove your finger.