LiViTech Defender Heavy Military-Duty Series Case & Holster for iPhone 4 & 4s (Yellow) Compatible with iPhone 4S and iPhone 4 Complete functionality is retained through the Defender Series iPhone 4S case, including speaker, microphone, camera and flash Plug covers protect the core openings of the phone, including volume controls, power button, and headphone jack Three layers of defense include an inner polycarbonate layer and an outer silicone layer