Uses HT8 TX module.  This is uses throttle settings for a BLHeli brushless ESC and may not work with the brushed version.

To use, briefly switch to SC- to arm the ESC.  Now set collective to mid-stick then switch to SC- and the ESC should spin-up.  Switch to SC↓ for higher head speed.  To stop set SC↑.

There is only idle-up and the throttle speed setting is for BLHeli in "Gov TX" mode.

http://www.youtube.com/watch?v=RB6AGzlnuq4