http://www.youtube.com/watch?v=XFFJQW7uGhs
http://www.youtube.com/watch?v=9RQaX5ry7Dg
The YouTube poster says it's malfunctioning, but it could have a different controler. The DTMF heard at the beginning of both videos sounds like Whelen DTMF. The blower does sound a little slow.