Urbanista’s cool new Seoul Wireless Earbuds work like any other wireless earbud, with one special extra: a low-latency mode that promises to eliminate the annoying lag that makes gaming with wireless headphones so annoying. But the task they attempt is impossible.

Bluetooth headphones are simply fantastic, and Bluetooth earbuds are a level above. They fit snugly in your ears, and their nonexistent wires will never snag on a backpack strap, they won’t bounce off your clothes or send a bang into your ear, and they won’t get tangled in your pocket.

They sound great, the batteries last a decent amount, and some brands even have fancy augmented reality tricks up their sleeves. But there’s one thing Bluetooth can never, ever do: eliminate that lag.

“The delay in any Bluetooth transmission occurs because audio information has to be encoded for transmission and then decoded once it is received. No matter what you do, there will always be some delay to process this,” Gadget Review CEO Christen Costa told Lifewire via email.