The phrase "a device that allowed him" is correct and usable in written English.
You can use it when describing a tool or mechanism that enabled someone to perform a specific action or task.
Example: "The new software was a device that allowed him to streamline his workflow and increase productivity."
Alternatives: "a tool that enabled him" or "an instrument that permitted him".
Homunculus also gives Eike a device that allows him to travel through time and make changes in the past that prevent his own future deaths.
Morty of course understands that what today's harried white-collar family man needs is no ordinary remote, which is how Michael ends up with a device that allows him to hopscotch through time.
So the company gave him a cell phone and rented a device that allows him to light the boiler by remote control by dialing into the company each morning.. "I do this five days a week, and I'm on call in case the flame goes out," Rabbi Mendelson said.
He made Her First Romance at Monogram in 1940 and then moved to Columbia, where he helmed six movies in 1941, including Under Age, a crime drama about reform-school girls who are tricked into working for gangsters, and the horror film The Devil Commands, which starred Boris Karloff as a scientist who attempts to invent a device that allows him to communicate with his dead wife.
Meanwhile, scientist Newton Geiszler creates a device that allows him to drift with a damaged Kaiju brain.
The five-time NBA champion posted a video onto his Instagram account of him running on an anti-gravity treadmill, a device that allows him to exercise without having to support all of his body weight.
There he discovers a species of wild swan able to carry substantial loads, the gansa, and contrives a device that allows him to harness many of them together and fly around the island.
They included the firm's Blade laptops, which were designed when CEO Min-Liang Tan decided that he needed a portable device that allowed him to play games while he traveled.
But this past December, her father got a hearing device that allowed him to hear her sing for the very first time.
