Multi Charger is the smallest and most compact on the market today of its kind. This multi charger will charge up to 20 collars( T5 or TT15) or you could charge 1 Alpha and 19 collars. With the addition of splitters(sold separately) you could charge up to 40 collars with our charger. This charger is available solely by itself or you can add the right number of USB cords for your needs. Each USB cord(listed separately) is approximately 20" and will give you the flexibility to neatly organize your charging area.