Help,how is the new selfie iPhone case

I am newbie named Chris and so glad to join the one of the biggest iPhone group,i believe that there must be sorts of professional knowledge expert in the iPhone and iPhone accessories,that's why i feel free to leave the question! I found a pretty cool new extendable self-timer selfie phone case which can be either put at the back side of phone case or to be a selfie stick to take photos, I am so interested in it and i intend to buy it for my GF,she would be surprising, but i was wondering how the new selfie iPhone case is and whether the online shop is trustful.I uploaded the pictures for your reference,highly appreciated to your prompt recommendations!

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