Reloop Mixtour - will it charge iPad Pro 9.7?

Thinking about getting a Reloop Mixtour for use with DJay Pro on my iPad Pro (9.7’) but some of the reviews I’ve seen online seem to indicate that the Mixtour doesn’t put out enough power to charge the iPad Pro while it’s in use.

Can anyone confirm if this is the case and if so, are there any workarounds that would make it worth picking it up for use with iPad Pro?