I need a GoPro selfie stick but I don t know what one to buy?

I need a GoPro selfie stick but I don t know what one to buy?
Added (1). I bought a Smatree one and I realized its good for video recording but there's not a button where I can take photos? I have a GoPro Hero 4 Silver and I want to be able to take photos when I'm against a scenery/under water etc when I'm travelling. What do I need to buy? Im so confused

Read more: I need a GoPro selfie stick but I don t know what one to buy?