Perfect compatibility with OPPO A57 4G/A77 4G High quality, hard and durable plastic back with 360 degree rotating metal ring bracket can be used together with magnetic car holder and rubber inner gel material Comfortably fit your phone and protect it from dust, dirt, scratches, and accidental drops. Anti slip handle and user-friendly technology: easy to press cover button. The shock absorption design aims to absorb, evenly distribute, and cycle impacts into the bumper. The innovative bracket provides great flexibility and convenience, allowing you to watch videos and movies with enviable comfort. The precise cut preserves full access to speakers, ports, cameras, and control buttons, while the award-winning molded edge technology enhances durability at the most vulnerable points.