it is an apple stylus pencil which is not compatible with ipad pro 12.9 1st and 2nd, ipad pro 10.5, ipad pro 9.7, ipad 1st to 5th gen, ipad mini 1 to 4 gen, ipad air 1st and 2nd.
also nor compatible with iphone, android, Microsoft devices.
(I bought this for my ipad but forgot to check the model it is compatible with and I have a 5th gen ipad so I can't use it that's why I'm selling it. it is in super good condition got it just today)