if its a good one

its a little pocket one its a "sky" brand yeahh i got it for 111 on ebay

i play trombone as well, im not sure if i got a good trumpet?

you tell me what you know of this brand?

There are good and bad pocket trumpets, but for a beginning player, a pocket trumpet is a bad choice. Keep it of course, and enjoy it. They can be loads of laughs and are easy to carry about. To begin trumpet instruction, you should get a quality student level (or better) instrument (full size, as pocket horns are difficult to play) IN FINE CONDITION. The valves should not leak, etc. I won't go down the whole list. So this means you would do well buying from a reputable music house or reseller who knows trumpets well, preferrably one who does repair on trumpets on site. Though you may get a good instrument from Ebay, you may also buy a pig in a poke, since many sellers don't understand the fine points of trumpet mechanics, and may well think they have fine instruments. You won't know what you have until some time down the road, and by that time, the less than quality instrument may have caused you to give up on the trumpet dream.

I have never herd of that brand but i know that it is most likely not as good as
Bach or other top companies, if this was your first trumpet i might have suggested a
cornet.