The PlayStation Portal is an accessory for the PlayStation 5, not a handheld console like the Nintendo Switch or the PSP and PS Vita.
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PlayStation Portal review round-up: Is Sony's new handheld worth buying?
PlayStation Portal Review: A PS5 in Your Hands, With Limits - CNET
Sony PlayStation Portal Review: A Handheld PS5 Companion
PlayStation Portal Is Finally Back In Stock at Best Buy - IGN
PlayStation Portal review: A baffling handheld for no one but Sony diehards
You can now buy the controller with a screen called PlayStation Portal - Softonic
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Here's where you can buy the PlayStation Portal in 2024.
PlayStation Portal Remote Player
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PlayStation Portal – Review Roundup