The South Korean electronics company LG is selling a television set that drives away mosquitoes with ultrasonic sound waves. It's marketing the TV in India, where mosquitoes are a major public health menace. Each 32" monitor costs about $400 USD. UPI quotes the company:
"The ultrasonic sound waves effectively drives away the mosquitoes keeping your loved ones absolutely safe at home. Since no harmful chemicals are used, it is also odor-free and not hazardous to health like the conventional methods used for keeping mosquito away," the company said on its website.
-via Ace of Spades HQ