Wow, this is great! I actually gave them a call and talked to someone at pressurepro (nice guy!). He said you don't actually need the antenna for a car cause the monitor comes with it. Also said it could be used with a serial-to-usb adapter. I guess you can set the monitor up so that every x minutes, it uploads data to your computer/pda. The data is raw data including pressure readings and pressure alarms! This seems very cool, alittle pricey I agree but definitely a cool toy! With some simple software, it could be pretty neat!