Whispersync：与Audible有声书同步，实现“阅读+听书”无缝切换。 - Send to Kindle：支持将个人文档（PDF、TXT等）通过邮箱或APP推送至Kindle设备。

Whispersync for Voice – Whispersync for Voice is a feature that lets you switch between reading and listening to an audiobook on the Kindle. It works across devices, so you can switch between ...