This is probably Google's 4K Chromecast “Ultra”

Comes with all original parts including original box

Google Chromecast Ultra 4K Digital Media Streamer - Original Box - GA3A00403A14

Chromecast Ultra vs Apple TV Review: Now Both Have 4K - Tech Advisor

Chromecast with Google TV (4K vs. HD) Review: Among the Best

Google Chromecast with Google TV - Streaming Entertainment in 4K HDR - Sunrise GA01920-US - The Home Depot

Chromecast Ultra review: Better video quality comes at a cost

Google Stadia on Google TV with Chromecast vs Chromecast Ultra 4K Comparison

Chromecast Review 2018 - A Cheap But Capable Streaming Device

AVOID HASSLE - eliminates the need to find an AC outlet near your TV by powering Chromecast directly from your TV's USB port. ADVANCED TECHNOLOGY

Mission USB Power Cable for Chromecast and Chromecast Ultra (CHROMECAST NOT Included)

Deal Alert! Chromecast With Google TV 4K is On Sale