Compatible with Samsung galaxy note 8,big enough even if your device has been put into other protector case .Designed specifically to easily connect headphones and provide full access to all phone ports and sensitivity Water-resistant neoprene and PVC screen protector protect your smartphone from scratches,dirt and sweat in outdoors, installed in seconds. Designed to twist and bend but will not lose the original shape. Adjustable Velcro band supports a wide range of arm girth from 10" (25.4cm) to 15" (38.1cm). Adjustable velcro strap protects and stabilizes device without slipping or constricting.