Smart phone fits in easily. Shutter button makes good connection to the smart phone for taking pictures. My only complaint is not being able to tighten enough the the selfie stick to keep the smart phone from slipping and sliding at the end of the stick. Works fine for a picture or two, but if doing a video, the focus will suddenly shift one direction or the other as the phone slides to the side. There are gears to tighten things, but they are plastic and I am afraid if I tighten them too much, they will break. But for 99¢, I am not disappointed. It works!