How much does this cost to the nearest dollar?

SideTrak Solo Triple Portable Monitor for Laptop | 2 Freestanding 15.6” FHD 1080P LED Screens | Compatible with Mac, PC, & Chrome | USB-C or HDMI | Speakers & HDR Mode
TRIPLE SCREEN SETUP Instantly triple your laptop screen workspace with these plug-and-play freestanding portable monitors! Working with three screens will allow you to maximize productivity and have time for the things that matter most. EXCEPTIONAL PICTURE QUALITY These 15.6” Full HD LED IPS anti-glare portable monitors provide a bright, colorful, and immersive viewing experience! Turn on HDR Mode while you’re watching movies or gaming on your portable monitor for an amazing true-to-life picture with low latency. ULTRA COMPATIBLE Powered by Mini HDMI and USB-A

Price is $540.00

Price: $539.99