SEE IT: 7-week-old's priceless reaction to hearing for the first time

A video posted on YouTube shows a 7-week-old boy hearing for the first time using his new hearing aids.

“Our beautiful son Lachlan was diagnosed as having moderate to severe hearing loss in both ears,” Toby Lever wrote in the video description.

“When he was 7 weeks old he received his first hearing aids. His reaction when they were turned on was truly amazing. We cried from happiness. Our beautiful little boy is now two years old and doing remarkably well.”

The video has been viewed more than a million times.