I saw a review here that said this product is a lifesaver for musicians who want to use their midi keyboard with their iOS devices but don't have a headphone jack! YOUNG OOOF! THIS GUY IS RIGHT!) I love my mini rig! Thanks to this great little adapter! Latency is almost ZERO! The delay is really not audible! I also played straight from my Roland KC 600 amp! I had to buy an additional adapter (FROM LIGHT CAMERA TO USB ADAPTER) which again cost about $12! This adapter even powers my midi keyboard, HOW COOL! I don't even need a 12V power supply! It's worth every penny! This will drain your phone's battery, but if you have a wireless charger you can play for hours!