SK Telecom said subscribers can pay 3,000 won (US$2.50) to download a sound wave that is inaudible to human ears but annoys mosquitoes within a range of three feet.

• 韩国鲜京电信(SK)表示定制用户可以花费3000韩元(合2.；54美元)下载一种声波，这种声波人耳察觉不到，但可以在3英尺范围内驱赶蚊虫。