SmallRig Standard Universal Mobile Phone Cage CPU2391B is designed to fit most smartphones in the market. It’s compatible with smartphone width from 63mm to 86mm. It features a spring-loaded clamp for quick attach/detach of the phone with greater locking force. The cage comes with multiple 1/4”-20 threaded holes and two cold shoes for attaching a tripod, LED light, microphone, etc. Threaded holes on the top could be used to attach a top handle like SmallRig Camera/Camcorder Action Stabilizing Universal Handle 1984 for moving shoots. Those 1/4”-20 thread holes with notches could be used to mount a SmallRig Holder for Portable Power Banks BUB2378 to attach a power bank when a sustainable charging solution is required. And the side 1/4”-20 thread holes can be used to attach the SmallRig Mobile Phone Cable Clamp BSC2390 to ensure a tight joint of the cable like a Lightning cable, USB-C cable or an adapter. The cage also makes it possible of acting a smartphone as a monitor by using a monitor mount like SmallRig Swivel and Tilt Monitor Mount with Cold Shoe BSE2346. The cage features two holes on the bottom for lanyard attachment. The built-in rubber pads could protect possible scratches to the phone.