U4 Monitor Wireless System : Very neat In-Ear-Monitor (IEM) at a reasonable price

This has only been tested at home so far, so this review will likely be updated at some point once the U4 IEM has been gigged and aspects like performance & interference in a crowded 2.4gHz environment, and battery life can be tested.

Operation is about as complicated as pouring a glass of water. Could not be more intuitive or simple. Sound quality with fairly standard mid-price range earbuds is very acceptable. It will doubtless be even better with more expensive buds.

The transmitter is a little bit chunky, so I do not know yet whether it will interfere with neighbouring XLR's or XVive U4 transmitters. I purchased a LyxPro XLR 'elbow' (Amazon USA) to counter this potential issue.