Portable iPad setup with cue output?

Alternative to griffin cable? Looking for a portable setup with my iPad Pro with cue output. Has anyone tested the plug key from Korg? Does it give you independent cue out and main out? I already have a a BeatPad but need something smaller and simpler for smaller events. Also is there an equivalent to a transformer kill on djay pro? I like to do echo drops and bring it back on beat so stoping track won’t work. Thanks