Abstract: A case for a portable electrical device, such as a tablet computer, can protect the device when using in outdoor activities, such as boating or hiking, or in other conditions that present a danger to the device. The case includes an inner chamber for receiving the electrical device therein. The case includes open configuration in which the electrical device can be inserted therein or removed therefrom. The case can also include a closed configuration in which the device is enclosed therein. The case can include a first case portion and second case portion that sealingly engage each other so as to avoid the infiltration of water and/or other liquids into the inner chamber. The case can be adapted to allow a user to operate the device while enclosed therein. For instance, the case can include a screen through which the touchscreen of a device can still be operated.