How can I tell which model of Philips Sonicare AirFloss I have? Updated on 2019-11-17 If you are wondering which Philips Sonicare AirFloss model you have, there is an easy way to find out. Check out our tips below. Find model number Your Philips Sonicare AirFloss has a model number, located on the bottom of the handle, starting with “HX”. If you are having trouble finding the model number, please contact one of our Consumer Care agents. AirFloss types Another tip to identify which AirFloss types you have, please see below: AirFloss Pro/Ultra: has 3 LED lights with a decorative accent ring on the handle where the nozzle attaches. AirFloss: same colour as your nozzle.