Chevron Zig Zag Yellow Snap-On iPhone Cover w/ Black Carrying Hard Plastic Case for 4/4S iPhone Shock absorbable and anti-bump for ultra protection. We can provide custom phone cases with any design for you. If you want, please contact us! Form-fitting durable protection Ergonoamic, form-fitting protective ultra-resistant case-and-battery-in-one for your phone. Integrated power switch allows you to switch on/off the battery case. Only use the battery when you need it.