HP PhotoSmart 635 2.1 MP Digital Camera w/3x Optical 2 megapixel sensor captures 1636 x 1236 images for prints up to 8 x 10 inches 3x optical plus 4x digital zoom lens (for 12x total) with autofocus 1.6-inch LCD; capture video with sound that's limited only by amount of memory 16 MB internal memory; compatible with Secure Digital and MMC memory cards Powered by 2 AA batteries (alkalines included, rechargeables recommended); connects to PCs and Macs via USB 1.1