You can get the Mobile Pixels DUEX Plus portable laptop monitor on sale for $239.99 right now (reg. $339) through April 7 using promo code SECURE20. It's a 13.3-inch HD screen that magnetically attaches to the back of your Mac or Windows laptop, sliding out on either side to function as a second screen. You could also use the kickstand, portrait mode, and 270-degree adjustments with Nintendo Switch and Samsung DeX supported devices, creating a multi-monitor setup for work, games, coding, and presenting.
You can get the Mobile Pixels DUEX Plus portable laptop monitor on sale for $239.99 right now (reg. $339) through April 7 using promo code SECURE20 until April 7 at 11:59 p.m. PT, though prices can change at any time.