I'm in a search for a Field Monitor. If you have or knows who is selling one, please point me out. Thanks !!
Definitely not worth it if you can't get it, complete with outside temp sensor, for under $200.
The field monitor unit in Subaru's are made by the same company that make's the Toyota monitors. I've heard you can order the temp sensor for cheap from a Subaru dealer, and it will work perfectly with the Surf monitors. Just in case you find one for way cheaper that doesn't include the sensor.