Polarizing filters are used to select which light rays enter your camera lens. These filters remove unwanted polarized light that reflects from surfaces such as water or glass. The polarizer also visibly saturates colors for striking effects, especially with transparency film. The range of effects is easy to preview in your camera's viewfinder; simply compose the picture and rotate the filter. Wirelessly transfer or print your images as they are shot via 802.11b/g speeds up to 20m away (Wireless printing requires PD-10 Wireless Printer Adapter) Rotary Multi Selector makes feature selection fast and easy Voice memos In Camera Red-Eye Fix Face Priority AF 23MB Internal Memory; SD Memory Card Slot An SD Card is NOT included, therefore we suggest purchasing an Optional 512MB memory card. It will allow you to store a lot more Video and images, as well as take advantage of the camera's high resolution abilities. PictBridge compatible for printing images without a computer USB and A/V interface (A/V with COOL-STATION) Approximate Unit Dimensions (w x h x d) - 3.7 x 2.3 x 0.8 inches / Unit Weight - 4.8 ounces (without battery and SD memory card)