GoPro Hero 3 universal bike mount (I don't know if its compatible with the Hero 4 so please let me know if you figure out because I don't have a Hero 4). iPhone 5/5s with Thule Case but even though I designed it specifically for the thule case it works with the speck candy shell. You can also you can use the ram spacer as a base and make other mounts like iPhone 6 mount etc. Note: Make sure you put something thin like a piece of ninja flex under the ram spacer so that it doesn't weave while riding your bike.