The other (and perhapsthe main:) goal of this device is that you can use it to impress your potential future girlfriend. Just imagine: you came on a date, asked her to download a little app from Play Market (or App Store), connected her phone to some strange MAC address via bluetooth, opened the app (RemoteXY Free) and asked her to set her favorite color from three RGB sliders. She did - and this color appeared in the form of a triangle on your T-shirt... After that you tell her to turn on the pulse oximeter, take her finger and put it to the sensor - and the triangle on your T-shirt starts blinking. how her heart beats ...

That is the most romantic device I've ever made for today^_^.