I wouldn't spend $89 bux to avoid resetting the radio, but that's just me. Just be careful, though. Anything sensitive enough to read milliamps will fry when too much current passes by it.
That said, the specifications of the meter you asked about say nothing about measuring DC current.
Google 'Low Current DC Amp Probe'. Here's the one I own:
http://shop.store.yahoo.com/brandsplace/0246-esi695.html