Maximum Battery Life: 10 days Flash modes: signal perception Flashing color: colorful Specification:Product name: Flashing aluminum protective case for Apple's iphone 4/4sMaterial: Plastic + aluminum Battery model: CR2016Maximum Battery Life: 10 daysFlash modes: signal perceptionFlashing color: colorfulThickness of bottom: 0.45cmThickness of edge: 0.1cmSize: 11.7cm×6cm×1.1cmAvailable color: Blue w/translucent trimCompatible with apple’s iPhone 4/4sPacking: window box Futures:1. LED light flashes/blinks in six alternative colors for approximately 15 seconds the goes off when making or receiving a call or sending or receiving a message.2. Protects iPhone on sides and back from scratches and dents3. Designed to fit both iPhone 4 or 4s4. No interference with iPhone buttons, ports, or connectors5. One 3V lithium battery (CR2016) is included (Please note: the negative side is up when push it into the back cover); can be replaced when used up

Blue Flashing aluminum protective case, mobile phone holder for Apple's iphone 4/4s