Personalize your pictures with HP Sprocket 3x4, instant photo printer. Download the HP Sprocket app on your smartphone and customize your photos before you take them to print. Create fun, vibrant, and colorful prints using borders, stickers and more on the photo-editing app. Share your eye-popping images on social media or spread your 3.5” x 4.25” prints to friends and family. With Zink paper in your printer, your photos produce vivid color without the need of ink. Make your photos your own then print them out on waterproof, tear-resistant, and sticky-backed Zink paper. The portable design of this printer allows you to capture and print out fantastic moments anywhere you go. Snap beautiful photos on vacation, during holidays, and at parties, then get gorgeous, clear prints of bright smiling faces instantly.