@5Cent I love my Northstar boom sprayer... but I had some questions about changing nozzle and tips to modify spray rate. I found out they are out of Australia and didn't get much response back from the company. I will steer clear of them when it is time to replace.
Dan are you talking about the one on the bottom? MAC address lookup shows "select comfort" as the vendor. Do you have a sleep number bed by chance? If so it probably has a Bluetooth connection you can connect to on your phone.