HEG device + nIR or pIR sensor. Good to go with Synapse Web App.
A package which includes the X-wiz HEG blood oxygenation acquisition device and either the nIR HEG (Toomim system) or the pIR HEG (Carmen system) capture device. Good to go when software is purchased separately, or you choose to use the free Synapse.Earth Web App. Note that Synapse.Earth requires Chrome Browser on ChromeBook or Android.