This device gives you visual feedback inside in Ableton Live e.g. for seeing if toggled Audio FX are on or not.
For further info and video tutorial please visit:
By purchasing this device (even for "0 USD") you agree to be added to the AbletonDrummer mailinglist, where you will get informed on updates on devices like this and other infos regarding Ableton Live and drumming. You can un-sub any time of course.