Sharper Image has a REWARD-type remote gadget, SI398 (note the idiots use an 'I' in a numerical string) which I suppose is described on their site.
Cute idea - this one rewards behavior via sounding a note (?) on a collar thigie: which means (as you've shown him/her, previously) -- there's a Neat-o Treat in the usual dish.
$169. Pity - but on sale for $100. Betcha it wouldn't be hard to use a remote 'key-finder beeper =CHEAP= and accomplish the same conditioning idea..
Arf-arf-arfarfarf