Easy to Install: 1/4" Standard Screw，There are two option to use the phone clip, portrait mode (vertical) or landscape mode (horizontal) | Usage occasions: Special design which is the first person perspective shoot for buyer, it could show the actually picture what you saw.skiing, fishing , biking, motorcycle ,Vlog, Facebook live,Hands-Free for commentary on the video | Adjustable headband for most head sizes: There are specially designed slip proof adhesive strips and comfortable foam pads to protect the back of the head. You don't have to worry about slipping and damage your mobile phone or camera. | Applicable wide: Phone holder fits most cellphones,(width between 50mm - 100mm ),including iphone SE 2020 iPhone 11/11Pro/Max/X/Xs/XR/Xs Max,8/7/6/6s, 6s plus,/5s/5/5c,Samsung Galaxy s20, s20+ S20 Ultra s10s10 plus S9/S9+,S8/S8+/S7/S6/S6 edge, Note 10 9 8 5 and so on. And it extremely easy to get adjusted to hold or release the phone. If you have a motion camera, it's compatible with GoPro Hero 9 8 7 6 5 4 3+ Black, /Akaso/ insta 360 one X one R/ Fitfort / Eken H9r /DJI OSMO Action and More. | Package includes:1*Headband bracket, 1*Mobile phone holder, 1*Adapter 1*Long screw. Weight: 4.3 oz