The HUD includes over 300 trigger phrases and operates in 3 modes - automatic, click only, and loop mode allowing you to hold animations indefinitely and combine animations.
From the description on Outy's Second Life Marketplace:
With this HUD, you can mix facial expressions like paint. Great for models who need to hold a pose indefinately, in-world performers who want their mouth to perform dynamic movements during a performance, those who want a timed auto-smile, or even those who just want to make silly or ugly faces(Combining animations can make for some pretty crazy faces).
Auto Emote v2.0 supports 950 phrases, and you can edit them to your liking. The Auto Emote Trigger Phrases notecard contains groups of 50 triggers per facial animation.Here's a video I made of me using the Auto Emote HUD:
Available on the Second Life Marketplace for L$500