Airdrop of Mac Air Mid not supporting with ipad and iphone.

My Macbook Air Mid 2011 OSX ELCaptain's Airdrop not working with iphone5 iphone5S and iphone5c and even not with ipadAir.But all the other devices are getting connected in the same network.Adding a screenshot of my airdrop menu of mac cose i think im missing some of the options in the airdrop to the lower end of the screen please find me a solution..!!