Also the DGT 2010 (or the DGT NA if you live in America) would be good for this, it has 1 manual spot for whatever time control you want. However, compared to the DGT 3000, it does not show seconds until the clock goes below 20min but I wouldnt really worry about that, its a really nice clock.
Also consider the DGT 2500, which replaces the 2010 and shows seconds like the 3000. The display on it looks fantastic! Personally I own a 3000 but I might as well use a 2010 like we do at the club, its a equally nice clock in my opinion
There are other clocks too, a brand called "Leap" that is cheaper than DGTs offerings. Good clocks, I dont now the exact model numbers though. And there are more expensive clocks too, like Chronos and Zmart etc which seems nice.
Have a look here and the shop around for the best price:
www.houseofstaunton.com/chess-products/chess-clocks/digital-chess-clocks.htmlTL:DR Just get one of the DGT clocks mentioned, you will have a clock that can do what you want and hold up for a long long time :-)
Bonus tips on DGT:
See if you can find one used and include a search for the DGT XL. Its is basically a DGT 2010/3000 hybrid that can connect to a DGT board. Excellent clock does "everything". Does also not show seconds until it reaches 20 minutes, but again - its not a big deal imho