The Asus Devilcase Guardian TPU Back Cover in black for the Asus ROG Phone 9/9 Pro/9 Pro Edition is the ideal protective case for your device. This lightweight design offers a bright and glossy finish. The case aims to preserve the design while protecting it from drops In addition to protection from drops, this case from Asus has a transparent, non-slip back made of sturdy plastic. Your camera lenses are also well protected by the aluminium camera ring.