Concord Keystone ( launched its newly redesigned NautiCase, a protective case for the iPhone 4S/4 at this week’s Consumer Electronics Show (CES) in Las Vegas.

The company says the NautiCase now boasts clear voice transmission, full access to all buttons, and improved lens protection resulting in glare-free flash photography. The new version features all the features of previous versions, including its shock-absorbing tough rubber skin, clear touch screen protective foil, textured bumper for firm grip, and easy access flaps for the dock connector and the headphone mini-jack.

The NautiCase is purportedly not only sand- and dust-proof, but also splash-proof It employs a one-piece design. To use, open the case, place the phone inside, and snap the NautiCase closed.

The NautiCase offers a choice of six color combinations and is equipped with a holster that holds the phone in a face-in or face-out position and doubles as a video viewing stand. The US$49.99 case works with iPhone 4S/4 in black or in white from all phone service providers.