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-- dc-40 (http://forums.ukcdogs.com/showthread.php?threadid=370452)

dc-40

what is the difference between the new 40s and the older 30s?

supposed to be better way of charging them, has up to 120 second delay so more batter life, you can put your g2 shock collar on it, seems to be a better overall design. you can go to garmins website, they have a full write up on it.