The Onn 58" 4K UHD HDR Roku Smart TV (Model 100069454-CA) is a 58-inch LED TV with 4K Ultra High Definition resolution, HDR10, and Roku's smart TV interface. It features a 60Hz refresh rate and includes 3 HDMI ports, 1 composite, 1 USB, 1 optical, 1 coaxial/cable, 1 LAN, and 1 headphone connection. 
Here's a more detailed breakdown:
Key Features:
Screen Size: 58 inches (actual diagonal measurement is 57.5 inches).
Display Resolution: 4K Ultra HD (2160p).
HDR: Supports HDR10 for enhanced picture quality.
Refresh Rate: 60Hz.
Smart TV Platform: Powered by Roku, offering access to thousands of streaming channels and apps.
Connectivity: 3 HDMI ports, 1 composite, 2 USB, 1 optical, 1 coaxial/cable, 1 LAN, and 1 headphone jack.
Other Notable Features: Wireless streaming, Bluetooth connectivity.
Model Number: 100069454-CA. 
Additional Information:
The TV is a DLED (Direct LED) display. 
It supports wireless streaming. 
The Roku interface is known for its user-friendly design and easy navigation according to some customer reviews on Walmart.com. 
Customers have generally reported positive experiences with the picture quality, ease of use, and value for the price