The iTrack One pre is a device that allows you to record the signal from a microphone / guitar / keyboard etc into a supported iOS device. As it is not an output device for your iPhone or iPad, the ‘On’ LED will only light up once it has been connected, and a recording app such as Auria, Cubasis, GarageBand etc has been opened.
If no recording app is open, the ‘On’ LED will not light up.
Should you require any further assistance with this, our Technical Support team can be contacted here