The HP Sprocket 3x4 is a compact and portable photo printer that allows you to print extra-large and high-quality adhesive-backed photos in 3 x 4 inch format from your smartphone or tablet. It is the perfect companion for parties, events or just to print your best memories on the go. The Sprocket 3x4 uses ZINK (Zero Ink) technology, which means all the colors needed for printing are embedded in the paper, eliminating the need for toner or ink cartridges. With the Sprocket app, you can easily edit and enhance your photos before printing and even add fun filters and text. The app also lets you connect with friends and share your photos on social media. The HP Sprocket 3x4 is a fun and convenient way to turn your digital memories into physical keepsakes.