Laptops are awesome for day-to-day productivity, but it sucks when you’re on the go and stuck with a single screen. If you hate being cramped with limited screen real estate, you need a portable monitor. And right now, this Arzopa portable monitor is on sale for $60 at Amazon, a massive cut down from its usual $130 price tag. Note: This price is for Amazon Prime members. If you don’t have Prime, you can still get this portable monitor at a solid on-sale price of $86 — or you can sign up for a free 30-day trial of Prime to snag it at the Prime-only sale price. This portable monitor has a 15.6-i…