The Buzzards Roost Multi Charger is the smallest and most compact on the market today of its kind. This multi charger will charge 10 collars(DC50, TT10, T5 or TT15) or you could charge 1 Alpha and 9 collars. With the addition of splitters (sold separately) you could charge up to 20 collars with the charger. This charger is available solely by itself or you can add the right number of USB cords (BUZZ-USB) for your needs. If you have DC50 collars you do not need any USB cords. Each USB cord (BUZZ-USB, sold separately) is 3 feet and will give you the flexibility to neatly organize your charging area.