U盾 [－－]

Jyutping U teon5
Pinyin yōu dùn

Definitions (Wiktionary)
  1. noun
    USBKey (a USB-like device issued by banks to ensure online transaction security)

U盾 [－－]

Jyutping
Pinyin u dùn

Definitions (CC-CEDICT)
  1. USB key used as a security token in Chinese online banking