This is the Fotopro K-AP Smartphone Rig: another iPhone accessory that lets you attach microphones and lights to your device for professional filmmaking. It is compatible with phones from 5.5 to 6.8″. It has 3 cold shoes for your devices. It has multiple 1/4-inch screws, so you can easily attach it to a tripod or handles.
This rig can be used for horizontal and vertical shots. It has a hollow design not to cause any interference. It has an aluminum alloy construction, measuring 14mm x 178mm x 97.5mm (max). You can find out more about it here.