All-in-one: no need for installation, just take it out and use;Foldable and Adjustable:the clamp for cellphone (width 2.16-3.27 inches) is 270 degree adjustable, you could fold it to the handel, portable for taking it with you in your bag or pocket, if you want to use it, just rotate it to your favorite angle, tight it up with the scew of it;Extendable and portable: it could be extend to 34.85 inches,and fold to 7.95 inches, 4.48oz, perfectly balance the function and convenience for carrying;Hard structure and safe use: extendable part is made of stainless steel and clamp hard plastic; rubbery handle with strap.