The PT-EP01 underwater case has been especially customized for one camera of the PEN family, the E-PL1. It is the world's first waterproof housing for a Micro Four Thirds camera. The extreme light weight PT-EP01 (only approximately 1100g, just half as much as the PT-E06) is waterproof up to a water pressure equivalent to a depth of 40 meters. As a genuine advantage to the underwater photographer, you can make use of the Live View function on the one hand, but it is also possible to attach the electronic Viewfinder to the E-PL1 and use it underwater. Additionally the PT-EP01 has a small, but very important feature at the backside cover. The back is semitransparent and has a further monitoring window just below the LCD window, which allows you to detect any water leakage before having serious material damage.