Electronics are good , but plastic is very weak. The red and blue plastic broke already on installation.Overall this light bar looks to be a nice unit. The power plug is a standard receiver plug so it can be easily controlled by the third channel of a receiver. The volume control is very adjustable and not overly sensitive so it's easy to get the volume just right. There's only one wail sound for the siren which is fine. This is more a US wail versus a european high-low sound. The lights sequence through 8 patterns, but the pattern is not selectable.
My only minor disappointment is the scale of this light bar. It is not very low profile which doesn't fit the scale of the width. But my son doesn't car one bit, he just thinks it's cool.