The HP ENVY Photo 7858 is an all-in-one thermal inkjet printer designed for home use, offering printing, scanning, copying, and faxing capabilities. It delivers high-quality photo printing with up to 4800 x 1200 optimized dpi for color prints and 1200 x 1200 rendered dpi for black prints. Print speeds reach up to 15 pages per minute for black documents and 10 pages per minute for color.

The printer features a 2.65-inch color capacitive touchscreen for easy navigation and editing. It includes a 125-sheet main input tray and a dedicated photo tray that automatically matches settings to paper type. The 35-page automatic document feeder enables multi-page scanning and copying, while automatic two-sided printing reduces paper usage.

Mobile connectivity is robust with support for the HP Smart app, allowing users to print from social media or the cloud and scan documents directly to smartphones. The printer is compatible with Apple AirPrint, Mopria, and Wireless Direct Printing. Connectivity options include dual-band Wi-Fi (2.4/5GHz), Ethernet, USB 2.0, and a dedicated SD card slot and USB host port for direct photo printing from memory cards.

The printer uses two HP 64 cartridges (one black and one tri-color), with high-yield XL cartridges available to increase page output. It supports borderless printing up to 8.5 x 11 inches and is compatible with various media types including plain paper, photo papers, matte/glossy brochures, and envelopes. The monthly duty cycle is up to 1,000 pages with a recommended volume of 300 to 400 pages. Faxing capabilities include memory for up to 100 pages with a transmission speed of up to 33.6 kbps.