1. Cold Shoe Mount: With a cold shoe mount, you can attach accessories like microphones, photo lights, voice recorders, etc., making it more convenient to use mobile phones. 2. Rear Knob and Top Knob: The clamp's extension length and locking can be quickly adjusted with the knob on the back and the knob on the top. The two knobs can be used together or separately, and the locking force is strong, so you don't have to worry about your device shaking or falling. 3. 38mm for Arca Bayonet: With a 38mm for Arca mount and 1/4in screw hole design, it can be easily attached to tripods, monopods, easy to install and use. 4. Anti-slip Pads: Made of metal material, it is sturdy and durable, and has high stability. With anti-slip pads, it can increase friction and effectively prevent equipment from being scratched. 5. Suitable for Most Phones: The clamp's stretching range is 6.3 to 15 cm, which is compatible with most smartphones on the market. Wide range of uses, can be used for taking photos, vlogging video recording, video calls, conferences, live broadcasts, reading e-books or music, and other internet work, etc.