Exclusive report from Green Field at ISPO Beijing 2012, February 25, 2012:
At ISPO Beijing 2012, various cases for the iPhone 4/iPhone 4S were on display. One of them can instantly transform your beloved device into something like a Transformer, making it safe for outdoor use. It allows you to use your phone normally even in the rain. This case does have a minor downside, though: once it's installed, you can no longer use any of the iPhone 4’s side buttons, the headphone jack, or the charging port. You can only use the front Home button, but normal usage isn’t affected. The retail price for this waterproof case is around 200 RMB.
Waterproof case for iPhone 4/iPhone 4S