The Sonnet adapter requires no software and is bus-powered-it operates off its Thunderbolt connection and there’s no need to plug in a power supply. Either way you look at it, this handy Thunderbolt adapter adds functionality to your computer it is otherwise missing.Ĭonnect the Echo ExpressCard Pro directly to your computer’s Thunderbolt or Thunderbolt 2 port (1), or at the end of a Thunderbolt device chain with a Thunderbolt cable (sold separately). It’s also expands your computer’s connectivity by enabling the use of ExpressCard/34 adapter cards. Sonnet’s Echo ExpressCard Pro is the fastest, least-expensive SxS™ memory card reader available.