CiDoss Newest 2016 4-In-1 Mini Portable Bluetooth, Dual Wireless Speakers with Ultra Bass The adjustable size braces allow for virtually any phone or portable devices to be securely mounted up to 3.75" For width. Soft cushion grip hugs your phone tightly and securely Adjustable two side-grips support arms fit the width of your device and a quick button release bracket to your phone Shockproof design, providing a stable viewing environment and adjustable size secure from falling Strong-hold, spring-loaded jaw firmly holds devices in place over the roughest of terrains