SK Telecom Co. 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.

 
  • 韩国鲜京电讯公司表示,定制此项服务的用户只需花3000韩元(合2.;50美元)便可下载一种声波。这种声波可以在三英尺的范围内驱赶蚊虫,而人耳却听不见。
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