Mine just has a switch. When the windshield gets wet, I flip it on. Works great.
Same here.
I like mine...
Windshield starts getting wet... wipers come on slow.. headlights and taillights turn on automatically...
if it starts raining harder, wipers automatically speed up to match the amount of rain coming down.
When rain slacks up, wipers slow down... when the rain stops, wipers stop and headlights and tail lights turn themselves off automatically...
I haven't had to do anything except just drive the car down the road...